main: successfully called inited a new World
World.__init__: display and mixer init sucessful
main: suceessfully inited a new world, old code commented oud
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World.event_loop: currently looks for QUIT only
World.handle_event_quit: deinits pygame, and calls sys.exit(0)
World.update_screen: updates screen with respect to the frame rate
World.event_loop: calling update_screen after iterating over the event_loop
Added doc for class spaceship and Spaceship.__init__
changed formatting in Spaceship.__init__
removed unnecessary comments in Spaceship.__init__
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refactored Spaceship.__init__ added attributes energy and MAX_NORMAL_ENERGY

added Spaceship.shoot as empty method
added spaceship skins to folder sprites
event handler -> game_event_handler
start_screen_even_handler, whereupon start screen intialises a new game
documented attribute players of class world
corrected method call in World.__init__
added attribute players (list (array) of instances of class Player)
removed start_screen_event_loop
renamey class SpaceShip to Spaceship (see oxforddictionary =)
Player.action_handler returns position of spaceship as numpy vector
removed Player.save_action
In World.game_event_loop einen key handler für Player eingeführt
UGLY working code
World updates screen after KEYDOWN event

code needs clean up!
movableobject angelegt (noch nicht eingebunden)
Shot angelegt als MovableObject (noch nicht eingebunden)