Add HTML5 option to the cmake file.
Add makefile to Box2D to generate bitcode and the generated bitcode.
Add a Makefile to generate html5 page.
Fix javascript error.
Fix crach when render filled circles.
SDL and emscripten functions move to main.
Some emscriptes fixes.
Remove emscripten cmake config.
Add emscripten info to the readme.
Fix readme.
Merge pull request #7 from Dgzt/emscripten

Emscripten