# Copyright (c) 2004 The University of Wroclaw.

# All rights reserved.

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#

=============================================================================

                        GNU GENERAL PUBLIC LICENSE

                          Version 3, 29 June 2007

Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>

    Everyone is  permitted  to copy  and  distribute  verbatim  copies  of  this

license document, but changing it is not allowed.

                                Preamble

    The GNU General Public License is a free, copyleft license for software  and

other kinds of works.

    The licenses for most software and other practical  works  are  designed  to

take away your freedom to share and change  the  works.  By  contrast,  the  GNU

General Public License is intended to guarantee your freedom to share and change

all versions of a program--to make sure it remains free  software  for  all  its

users. We, the Free Software Foundation, use the GNU General Public License  for

most of our software; it applies also to any other work released this way by its

authors. You can apply it to your programs, too.

    When we speak of free software, we are referring to freedom, not price.  Our

General Public Licenses are designed to make sure that you have the  freedom  to

distribute copies of free software (and charge for them if you wish),  that  you

receive source code or can get it if you  want  it,  that  you  can  change  the

software or use pieces of it in new free programs, and that you know you can  do

these things.

    To protect your rights, we need to prevent others  from  denying  you  these

rights or asking you to  surrender  the  rights.  Therefore,  you  have  certain

responsibilities if you distribute copies of the software, or if you modify  it:

responsibilities to respect the freedom of others.

    For example, if you distribute copies of such a program, whether  gratis  or

for a fee, you must pass on  to  the  recipients  the  same  freedoms  that  you

received. You must make sure that they, too, receive or can get the source code.

And you must show them these terms so they know their rights.

    Developers that use the GNU GPL protect your  rights  with  two  steps:  (1)

assert copyright on the software, and (2) offer  you  this  License  giving  you

legal permission to copy, distribute and/or modify it.

    For the developers' and authors' protection, the GPL clearly  explains  that

there is no warranty for this free software.  For both users' and authors' sake,

the GPL requires that modified versions be marked  as  changed,  so  that  their

problems will not be attributed erroneously to authors of previous versions.

    Some devices are designed to deny  users  access  to install or run modified

versions of the software inside them, although the manufacturer can do so.  This

is fundamentally incompatible with  the  aim  of  protecting  users' freedom  to

change the software. The systematic pattern of such abuse occurs in the area  of

products  for  individuals  to  use,  which  is  precisely  where  it  is   most

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the practice for those products. If such problems arise substantially  in  other

domains, we stand ready to extend this provision  to  those  domains  in  future

versions of the GPL, as needed to protect the freedom of users.

    Finally, every program is threatened constantly by software patents.  States

should not allow  patents  to  restrict  development  and  use  of  software  on

general-purpose computers, but in those that do, we wish to  avoid  the  special

danger that patents  applied  to  a  free  program  could  make  it  effectively

proprietary. To prevent this, the GPL assures that patents  cannot  be  used  to

render the program non-free.

    The precise terms and conditions for copying, distribution and  modification

follow.

                           TERMS AND CONDITIONS

0. Definitions.

---------------

    “This License” refers to version 3 of the GNU General Public License.

    “Copyright” also means copyright-like laws that  apply  to  other  kinds  of

works, such as semiconductor masks.

    “The Program” refers to any copyrightable work licensed under this  License.

Each licensee is  addressed  as  “you”.  “Licensees”  and  “recipients”  may  be

individuals or organizations.

    To “modify” a work means to copy from or adapt all or part of the work in  a

fashion requiring copyright permission, other than the making of an exact  copy.

The resulting work is called a “modified version” of the earlier work or a  work

“based on” the earlier work.

    A “covered work” means either the unmodified Program or a work based on  the

Program.

    To “propagate” a work means to do anything with it that, without permission,

would make you directly or secondarily liable for infringement under  applicable

copyright law, except executing it on a computer or modifying  a  private  copy.

Propagation includes  copying,  distribution  (with  or  without  modification),

making available to the public, and in some countries other activities as well.

    To “convey” a work means any kind of propagation that enables other  parties

to make or receive copies. Mere interaction  with  a  user  through  a  computer

network, with no transfer of a copy, is not conveying.

    An interactive user interface displays  “Appropriate Legal Notices”  to  the

extent that it includes a convenient and prominently visible  feature  that  (1)

displays an appropriate copyright notice, and (2) tells the user that  there  is

no warranty for the work (except to the extent that warranties are provided),

that licensees may convey the work under this License, and how to view a copy of

this License. If the interface presents a list of user commands or options, such

as a menu, a prominent item in the list meets this criterion.

1. Source Code.

---------------

    The “source code” for a work means the preferred form of the work for making

modifications to it. “Object code” means any non-source form of a work.

    A “Standard Interface”  means  an  interface  that  either  is  an  official

standard defined by a recognized standards body, or, in the case  of  interfaces

specified for a particular programming language, one that is widely  used  among

developers working in that language.

    The “System Libraries” of an executable work include  anything,  other  than

the work as a whole, that (a) is included in the  normal  form  of  packaging  a

Major Component, but which is not part of that Major Component, and  (b)  serves

only to enable use of the work with that Major  Component,  or  to  implement  a

Standard Interface for which an implementation is available  to  the  public  in

source code form. A “Major Component”, in this context, means a major  essential

component (kernel, window system, and so on) of the  specific  operating  system

(if any) on which the executable work runs, or a compiler used  to  produce  the

work, or an object code interpreter used to run it.

    The “Corresponding Source” for a work in object  code  form  means  all  the

source code needed to generate, install, and (for an executable  work)  run  the

object code  and  to  modify  the  work,  including  scripts  to  control  those

activities. However, it  does  not  include  the  work's  System  Libraries,  or

general-purpose tools or  generally  available  free  programs  which  are  used

unmodified in performing those activities but which are not part  of  the  work.

For example, Corresponding Source includes interface definition files associated

with source files for the work, and the source code  for  shared  libraries  and

dynamically linked  subprograms  that  the  work  is  specifically  designed  to

require, such as by intimate data communication or control  flow  between  those

subprograms and other parts of the work.

    The Corresponding Source need not include anything that users can regenerate

automatically from other parts of the Corresponding Source.

    The Corresponding Source for a work in source code form is that same work.

2. Basic Permissions.

---------------------

    All rights granted under this License are granted for the term of  copyright

on the Program, and are irrevocable provided the stated conditions are met. This

License explicitly affirms your  unlimited  permission  to  run  the  unmodified

Program. The output from running a covered work is covered by this License  only

if the output, given its content,  constitutes  a  covered  work.  This  License

acknowledges your rights of  fair  use  or  other  equivalent,  as  provided  by

copyright law.

    You may make, run and propagate  covered  works  that  you  do  not  convey,

without conditions so long as your license otherwise remains in force.  You  may

convey covered works to  others  for  the  sole  purpose  of  having  them  make

modifications exclusively for you, or provide you with  facilities  for  running

those works, provided that  you  comply  with  the  terms  of  this  License  in

conveying all material for which you do not control copyright. Those thus making

or running the covered works for you must do  so  exclusively  on  your  behalf,

under your direction and control, on terms that prohibit them  from  making  any

copies of your copyrighted material outside their relationship with you.

    Conveying under any  other  circumstances  is  permitted  solely  under  the

conditions stated below. Sublicensing  is  not  allowed;  section  10  makes  it

unnecessary.

3. Protecting Users' Legal Rights From Anti-Circumvention Law.

--------------------------------------------------------------

    No covered work shall be deemed part of an effective  technological  measure

under any applicable law fulfilling obligations under article  11  of  the  WIPO

copyright treaty adopted on 20 December 1996, or  similar  laws  prohibiting  or

restricting circumvention of such measures.

    When you convey a  covered  work,  you  waive  any  legal  power  to  forbid

circumvention of technological measures to  the  extent  such  circumvention  is

effected by exercising rights under this License with  respect  to  the  covered

work, and you disclaim any intention to limit operation or modification  of  the

work as a means of enforcing, against the work's users, your or  third  parties'

legal rights to forbid circumvention of technological measures.

4. Conveying Verbatim Copies.

-----------------------------

    You may convey verbatim copies of the Program's source code as  you  receive

it, in any medium, provided that you conspicuously and appropriately publish  on

each copy an appropriate copyright notice; keep intact all notices stating  that

this License and any non-permissive terms added in accord with section  7  apply

to the code; keep intact all notices of the absence of any  warranty;  and  give

all recipients a copy of this License along with the Program.

    You may charge any price or no price for each copy that you convey, and  you

may offer support or warranty protection for a fee.

5. Conveying Modified Source Versions.

--------------------------------------

    You may convey a work based on the Program, or the modifications to  produce

it from the Program, in the form of source code under the terms  of  section  4,

provided that you also meet all of these conditions:

    a) The work must carry prominent notices stating that you modified  it,  and

       giving a relevant date.

    b) The work must carry prominent notices stating that it is  released  under

       this License and any conditions added under section 7.  This  requirement

       modifies the requirement in section 4 to “keep intact all notices”.

    c) You must license the entire work, as  a  whole,  under  this  License  to

       anyone who comes into possession of a copy. This License  will  therefore

       apply, along with any applicable section 7 additional terms, to the whole

       of the work, and all its parts, regardless of how they are packaged. This

       License gives no permission to license the work in any other way, but  it

       does not invalidate such permission if you have separately received it.

    d) If  the  work  has  interactive  user  interfaces,  each   must   display

       Appropriate Legal  Notices;  however,  if  the  Program  has  interactive

       interfaces that do not display Appropriate Legal Notices, your work  need

       not make them do so.

    A compilation of a covered work with other separate and  independent  works,

which are not by their nature extensions of the covered work, and which are  not

combined  with it such as to  form a larger  program,  in or on a  volume  of  a

storage or distribution medium, is called an “aggregate” if the compilation  and

its resulting copyright are not used to limit the access or legal rights of  the

compilation's users beyond what  the  individual  works  permit.  Inclusion of a

covered work in an aggregate does not cause this License to  apply to the  other

parts of the aggregate.

6. Conveying Non-Source Forms.

------------------------------

    You may  convey a covered  work in  object  code  form  under  the  terms of

sections  4  and  5,  provided  that  you  also  convey   the   machine-readable

Corresponding Source under the terms of this License, in one of these ways:

    a) Convey the object code in, or embodied in, a physical product  (including

       a physical distribution medium), accompanied by the Corresponding  Source

       fixed  on  a  durable  physical  medium  customarily  used  for  software

       interchange.

    b) Convey the object code in, or embodied in, a physical product  (including

       a physical distribution medium), accompanied by a  written  offer,  valid

       for at least three years and valid for as long as you offer  spare  parts

       or customer support for that product model, to give anyone who  possesses

       the object code either (1) a copy of the Corresponding Source for all the

       software in the product that is covered by  this  License,  on a  durable

       physical medium customarily used for software interchange, for a price no

       more than your reasonable cost of physically performing this conveying of

       source, or (2) access to  copy the  Corresponding Source  from a  network

       server at no charge.

    c) Convey individual copies of the  object code  with a copy of the  written

       offer to provide the Corresponding Source. This  alternative  is  allowed

       only occasionally and noncommercially,  and  only  if  you  received  the

       object code with such an offer, in accord with subsection 6b.

    d) Convey the object code by offering access from a designated place (gratis

       or for a charge), and offer equivalent access to the Corresponding Source

       in the same way through the same place at no further charge. You need not

       require recipients to copy the Corresponding Source along with the object

       code. If the place to copy the object  code  is  a  network  server,  the

       Corresponding Source may be on a different server (operated by you  or  a

       third party) that supports equivalent copying  facilities,  provided  you

       maintain clear directions next to the object code saying  where  to  find

       the  Corresponding   Source.   Regardless  of  what   server   hosts  the

       Corresponding Source, you remain obligated to ensure that it is available

       for as long as needed to satisfy these requirements.

    e) Convey the object code  using  peer-to-peer  transmission,  provided  you

       inform other peers where the object code and Corresponding Source of  the

       work are  being  offered  to  the  general  public  at  no  charge  under

       subsection 6d.

    A separable portion of the object code, whose source code is  excluded  from

the Corresponding Source as a System Library, need not be included in  conveying

the object code work.

    A “User Product”  is  either  (1)  a  “consumer product”,  which  means  any

tangible personal property which is  normally  used  for  personal,  family,  or

household purposes, or (2) anything designed or sold for  incorporation  into  a

dwelling. In determining whether a product is a consumer product, doubtful cases

shall be resolved in favor of coverage. For a particular product received  by  a

particular user, “normally used” refers to a typical or common use of that class

of product, regardless of the status of the particular user or  of  the  way  in

which the particular user actually uses, or expects or is expected to  use,  the

product. A product is a consumer product regardless of whether the  product  has

substantial commercial,  industrial  or  non-consumer  uses,  unless  such  uses

represent the only significant mode of use of the product.

    “Installation Information” for a User Product means any methods, procedures,

authorization keys,  or  other  information  required  to  install  and  execute

modified versions of a covered work in that User Product from a modified version

of its Corresponding Source. The information must suffice  to  ensure  that  the

continued functioning of the modified object code is in  no  case  prevented  or

interfered with solely because modification has been made.

    If you convey an object code  work  under  this  section  in,  or  with,  or

specifically for use in, a User Product, and the conveying occurs as part  of  a

transaction in which the right of possession and use  of  the  User  Product  is

transferred to the recipient in perpetuity or for a fixed  term  (regardless  of

how the transaction is characterized), the Corresponding Source  conveyed  under

this section must be accompanied  by  the  Installation  Information.  But  this

requirement does not apply if neither  you  nor  any  third  party  retains  the

ability to install modified object code on the User Product  (for  example,  the

work has been installed in ROM).

    The requirement to provide  Installation  Information  does  not  include  a

requirement to continue to provide support service, warranty, or updates  for  a

work that has been modified or installed by  the  recipient,  or  for  the  User

Product in which it has been modified or installed. Access to a network  may  be

denied when  the  modification  itself  materially  and  adversely  affects  the

operation of the network or violates the rules and protocols  for  communication

across the network.

    Corresponding Source conveyed, and  Installation  Information  provided,  in

accord with this section must be in a format that is  publicly  documented  (and

with an implementation available to the public in source code  form),  and  must

require no special password or key for unpacking, reading or copying.

7. Additional Terms.

--------------------

    “Additional permissions” are terms that supplement the terms of this License

by making exceptions from one or more of its conditions. Additional  permissions

that are applicable to the entire Program shall be treated as though  they  were

included in this License, to the extent that they  are  valid  under  applicable

law. If additional permissions apply only to part of the Program, that part  may

be used separately under those  permissions,  but  the  entire  Program  remains

governed by this License without regard to the additional permissions.

    When you convey a copy of a covered work, you may at your option remove  any

additional permissions from that copy, or  from  any  part  of  it.  (Additional

permissions may be written to require their own removal in  certain  cases  when

you modify the work.) You may place additional permissions on material, added by

you to a covered work, for which you have  or  can  give  appropriate  copyright

permission.

    Notwithstanding any other provision of this License, for material you add to

a covered work, you  may  (if  authorized  by  the  copyright  holders  of  that

material) supplement the terms of this License with terms:

    a) Disclaiming warranty or limiting liability differently from the terms  of

       sections 15 and 16 of this License; or

    b) Requiring preservation of specified reasonable legal  notices  or  author

       attributions in  that  material  or  in  the  Appropriate  Legal  Notices

       displayed by works containing it; or

    c) Prohibiting  misrepresentation  of  the  origin  of  that   material,  or

       requiring that modified versions of such material be marked in reasonable

       ways as different from the original version; or

    d) Limiting the use for publicity purposes of names of licensors or  authors

       of the material; or

    e) Declining to grant rights under trademark  law  for  use  of  some  trade

       names, trademarks, or service marks; or

    f) Requiring indemnification of licensors and authors of  that  material  by

       anyone who conveys  the  material  (or  modified  versions  of  it)  with

       contractual assumptions of liability to the recipient, for any  liability

       that these contractual assumptions directly impose on those licensors and

       authors.

    All  other  non-permissive  additional   terms   are   considered   “further

restrictions” within the meaning of section 10. If the Program as  you  received

it, or any part of it, contains a notice stating that it  is  governed  by  this

License along with a term that is a further restriction,  you  may  remove  that

term.  If  a  license  document  contains  a  further  restriction  but  permits

relicensing or conveying under this License, you  may  add  to  a  covered  work

material governed by the terms of  that  license  document,  provided  that  the

further restriction does not survive such relicensing or conveying.

    If you add terms to a covered work in accord with  this  section,  you  must

place, in the relevant source files, a statement of the  additional  terms  that

apply to those files, or a notice indicating where to find the applicable terms.

    Additional terms, permissive or non-permissive, may be stated in the form of

a separately written license, or stated as exceptions;  the  above  requirements

apply either way.

8. Termination.

---------------

    You may not propagate or modify a covered work except as expressly  provided

under this License. Any attempt otherwise to propagate or modify it is void, and

will automatically terminate your  rights  under  this  License  (including  any

patent licenses granted under the third paragraph of section 11).

    However, if you cease all violation of this License, then your license  from

a particular copyright holder is reinstated (a) provisionally, unless and  until

the copyright holder explicitly and finally terminates  your  license,  and  (b)

permanently, if the copyright holder fails to notify you  of  the  violation  by

some reasonable means prior to 60 days after the cessation.

    Moreover, your license from a  particular  copyright  holder  is  reinstated

permanently if the copyright holder  notifies  you  of  the  violation  by  some

reasonable means, this is the first time you have received notice  of  violation

of this License (for any work) from that copyright  holder,  and  you  cure  the

violation prior to 30 days after your receipt of the notice.

    Termination of your  rights  under  this  section  does  not  terminate  the

licenses of parties who have received copies  or  rights  from  you  under  this

License. If your rights have been terminated and not permanently reinstated, you

do not qualify to receive new licenses for the same material under section 10.

9. Acceptance Not Required for Having Copies.

---------------------------------------------

    You are not required to accept this License in order to  receive  or  run  a

copy of the Program. Ancillary propagation of a covered work occurring solely as

a consequence of using peer-to-peer transmission to receive a copy likewise does

not require acceptance. However, nothing other  than  this  License  grants  you

permission to propagate or modify  any  covered  work.  These  actions  infringe

copyright if you  do  not  accept  this  License.  Therefore,  by  modifying  or

propagating a covered work, you indicate your  acceptance  of  this  License  to

do so.

10. Automatic Licensing of Downstream Recipients.

-------------------------------------------------

    Each time you convey a covered work, the recipient automatically receives  a

license from the original licensors, to run, modify  and  propagate  that  work,

subject to this License. You are not responsible  for  enforcing  compliance  by

third parties with this License.

    An  “entity  transaction”  is  a  transaction  transferring  control  of  an

organization,  or  substantially  all   assets   of  one,  or   subdividing   an

organization, or merging organizations. If propagation of a covered work results

from an entity transaction, each party to that transaction who receives  a  copy

of the work also receives whatever licenses to the work the party's  predecessor

in interest had or could give under the  previous  paragraph,  plus a  right  to

possession of the Corresponding Source of  the  work  from  the  predecessor  in

interest, if the predecessor has it or can get it with reasonable efforts.

    You may not impose any further restrictions on the  exercise of  the  rights

granted or affirmed under this  License.  For  example,  you  may  not  impose a

license fee, royalty, or other charge for  exercise of rights granted under this

License,  and  you  may  not  initiate  litigation  (including a  cross-claim or

counterclaim in a  lawsuit)  alleging  that  any  patent  claim is infringed  by

making, using,  selling,  offering for  sale, or  importing the  Program or  any

portion of it.

11. Patents.

------------

    A “contributor” is a copyright holder who authorizes use under this  License

of the Program or a work on which the Program is based. The work  thus  licensed

is called the contributor's “contributor version”.

    A contributor's “essential patent claims” are all  patent  claims  owned  or

controlled by the contributor, whether already acquired or  hereafter  acquired,

that would be infringed by some manner, permitted by this  License,  of  making,

using, or selling its contributor version, but do not include claims that  would

be infringed only as a consequence of further  modification of  the  contributor

version. For purposes of this definition, “control” includes the right to  grant

patent sublicenses in a manner consistent with the requirements of this License.

    Each contributor grants you a non-exclusive, worldwide, royalty-free  patent

license under the contributor's essential patent claims,  to  make,  use,  sell,

offer for sale, import and otherwise run, modify and propagate the  contents  of

its contributor version.

    In the  following  three  paragraphs,  a  “patent license”  is  any  express

agreement or commitment, however denominated, not to  enforce a patent  (such as

an express permission to practice a patent or covenant not  to  sue  for  patent

infringement). To “grant” such a patent license to a party means to make such an

agreement or commitment not to enforce a patent against the party.

    If you convey a covered work, knowingly relying on a patent license, and the