forked from: Sketch of Voronoi

Sketch of Voronoi
* I will recommend seeing in "FULL SCREEN" mode. 
* 
* based on 超速ボロノイ図 by fumix
* @see http://wonderfl.net/c/3TKq/
* 
* Fortune's algorithm - Wikipedia, the free encyclopedia
* @see http://en.wikipedia.org/wiki/Fortune's_algorithm
* 
* Controul > Speedy Voronoi diagrams in as3/flash
* @see http://blog.controul.com/2009/05/speedy-voronoi-diagrams-in-as3flash/
* 
* @author Yukiya Okuda<alumican.net>
