I added a scene-system, changed the engine for checking for new scenes
and loading them (there is one method missing for deloading the
resources) and changed the Test class to the starter file for the game
and added two scenes. 
The first scene get loaded at the start of the game, and the second is
loading after 500 ticks (only for testing).
Merge pull request #1 from trex22091995/PetersScenenTest

I added a scene-system, changed the engine for checking for new scenes