Move to 0.2.0-SNAPSHOT in preperation to fix bug #1
First pass at having a seperate system data structure.
I broke everything in entity management! (rewrite). Now let's see if I can put it back toghether in the tests.
Work In Progress. Currently working again: Adding entity, Can add and remove components, removing a component.
Refactoring of the entity management code complete.
Refactored the system function management as well. All looking good.
Oops. Forgot to pass the system to process-game-tick
Fix the process-one-game-tick so that it actually passes through the system structure.
Cleanup commented out code.
Found a redundant data structure. Removed.
Updated README to new retructuring.
Fix up the system creation example
Updates to readme.
Merge branch 'master' into develop

Conflicts:
	README.md
ready for release 0.2.0