Added GameObject class, moved the non-render related stuff from mesh to
gameobject
Added a constructor to GameObject
Adapting box to the new mesh layout
Added mesh as a parameter to GameObject and added an update method
Adapted physic to gameobject class
Added Platform class (a basic box) and set cuby to extend it
Added Axis class ( basic line gameobject )
Adapted Core, Camera and OpenGLHandler to using GameObjects
Adapted Hitbox and BoxTypeHitbox to GameObjects
Adapted Line to the new Mesh layout
Adapted Physic to the new Hitbox layout
Removed unused imports