add tween.js. use source maps with browserify
Merge branch 'master' of github.com:sandroweb/spjam

Conflicts:
	src/Game.js
	src/main.js
merging
add DS_Store to gitignore
Merge branch 'master' of github.com:sandroweb/spjam

Conflicts:
	src/Game.js
	src/main.js
Merge branch 'master' of github.com:sandroweb/spjam
fixing merge conflict
Merge branch 'master' of github.com:sandroweb/spjam
finally merge conflitct is done