Added evenbus and related listener interface and eventclass
Added events on tower and projectile
Commented on eventbus and related classes
Fixes with eventhandler
Fixed events for tower and projectile in WorldState
Added update for projectiles in TowerDefenceGame
Added fireing of event to Mob when it's born and dies
Implemented GameEventListener to MobsView
Removed unnecessary methods and variables
Merge branch 'Sebbe' of https://github.com/05K4R/OOP-Projekt-grupp-16 into Sebbe
Implemented GameEventListeners for Mobs in worldstate