Start clean up
Renamed bossDead-method
Changed set-speed-methods
Small change in projectiles' properties
Added new texture to ResourceManager
Small clean up in getEnemy-method
Removed weapons
Added more bosses in the game
Added an alternative boss texture
Renamed and simplified (some methods in) boss-classes
Renamed boss-class
Simplified firing-method in DefaultBossImpl
Fixed mistake from previous commit
Added getBoss() in EnemyType (removed boolean)
Added a get dimensions method for the PhysicsBody
Linked getDimensions method in enemy and projectile to their respective bodies
Moved methods from implemented bosses to superclass. Easier to implement
different bosses without code duplication.
Merge branch 'cleanupEnemies' into development

Conflicts:
	Bullet-Inferno-test/src/se/dat255/bulletinferno/model/mock/SimpleMockGame.java
	Bullet-Inferno-test/src/se/dat255/bulletinferno/model/mock/SimplePlayerShipMock.java