Added BaseGameObject.
Added SpaceShip movement functions
Slight modification in spaceship movement (Math.cos uses radians, not
degrees)
Merge branch 'master' of
https://github.com/Pierre-Demessence/Space-Battle.git

Conflicts:
	Star Battle Server/src/Game.java
	Star Battle Server/src/Server.java
	Star Battle Server/src/SpaceShip.java
	Star Battle Server/src/Star.java