Removed is_hungry and needs_sleep variables. Updated methods and tests for it. Renamed Animal attribute hunger_scale to funness_scale.
Animal eat() only works if fullness_scale is lower than 10. Tests regarding eating cleaned up. animal can_eat() cleaned up.
Added base class Game() and the three subclasses HideAndSeek(), CatchFrisbee() and JumpOverHedges() games. Tests were updated accordingly.
Added string representation for game sub classes. Added constans MAX_FULLNESS and MAX_AWAKENESS. Added documentation for all classes.
Merge branch 'master' of https://github.com/walter2/Animals