CHANGELOG-8202014-1136
MODELS:
Added getters to Ship and Turret for use in their Controllers
Updated Turret to have reference to Ship Owner
 - updated Ship to use the correct initialiser
VIEWS:
Created Bullet View to display bullets
CONTROLLERS:
Created Turret Controller that handles the firing of Bullets
 - Creates a Bullet Controller every interval based on Turret firing speed
Created Bullet Controller that fires a bullet in one direction
Added movement limits to Player Controller to prevent moving past window
PROTOCOLS:
Added shipDidMove method to Ship Control Protocol