Refactor timers and touches to behavior = event + effects
A more versatile multicomponent
Added generic behavior component
Added behaviors processor
Processing of touch events
Better handling of touches listeners
Processing of timers events
Mockup updated after changes
Renamed attribute engine -> gameLoop
Fix related tests
CoolDemo updated
Merge pull request #584 from anserran/behaviors

Refactor timers and touches to be behavior = event + effect
Added hud as entity category
Updated CoolDemo