Correcting a bug about the window. When nothing had to be redrawn, the window do not redraw anything on the screen, now the bug is fixed and the cache is drawn when nothing has changed on the window. The other bug fix is about AnimatedSprite. Now, when you stop an animation, it stops it but it also rewind it.
Merge branch 'dev' of tumbleweed-studio.net:tumbleweed into dev
upgrade to grunt 4. TW now use almond
refactoring
check for Polyfill dependances
remove debug code; rename Gameloop module to GameLogic
doc for Polyfill; correcting @extends doc tag
correcting yuidoc warnings
improve doc; export TW var in all files
add vendor lib for unit tests
merge with dev
capitalize module name
split Inheritance.js file
removing old deprecated files; correcting error in tests
improve doc
improve doc
add TrackingCamera; fix EventProvider warning
mv Gameloop to GameLoop
typo  on README.md
README.md