ported from https://github.com/gorhill/Javascript-Voronoi
completed Voronoi
site->point
added edge target and id
added Poly2d and Seg2d.project
added toString()
moved h3d.col 2d classes to h2d.col
added h2d.col.Circle and a few things
Merge remote-tracking branch 'upstream/master'
place box content on scroll-ready surface