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
improve doc; export TW var in all files
add vendor lib for unit tests
merge with dev
capitalize module name
split Inheritance.js file