Copyright (c) 2013, Michael Bostock

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modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this

list of conditions and the following disclaimer.

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this list of conditions and the following disclaimer in the documentation

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* The name Michael Bostock may not be used to endorse or promote products

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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.