Modify Hero :: Life + 2
Commit :: New screen (Menu) + Move directory + modify test.py to use new MenuScreen
Commit :: Modifs screen menu (to raise ChangeScreenException) and test.py (Manage changeScreen)
Commit :: Add life sprite, missile_generator, score in Menu screen
Commit :: Fix test.py
Commit :: Avoid Fix barrier
Merge branch 'master' of https://github.com/Bobbyshow/Avoid