drop emscripten version of box2d
gitignore
cleanup
version updates for stats, yuicompressor, hammer, howler
removed Box2DWeb
added Box2DHtml5
rewrite for box2dhtml5
demos rewrite for box2dhtml5
new chain shape demo for new functions of box2dhtml5 (box2d version 2.3.0)
modified combine.sh script
added new box2dhtml5 chain shape demo
new apidocs (yuidoc)