merged gh-pages, should have done this earlier
updated builds
removed jox dependency
improved world serialization and Demo restart
improved World serialization
moved DistanceConstraint.update to the .prototype
minor doc
better rendering of planes, etc
draw circle radius line
particle/plane collisions
added particle/circle collisions
updated readme
added Line shape stub
added PointToPointConstraint
removed unused code
updated build
updated readme
better Line support
update README
a little better resolution-fix for pixi.js