cocos2d test
Extensive changes to graphics class

Graphics now rendered using Cocos2d
Delete some test files
Added HUD

HUD shows attributes of a tile when hovered over. Some duplicate code
concerning mouse events still exists, decide what to do with this later.
Building a town hall

When pressing "space", a town hall will be built on the relevant tile.
Major change of logic, some refactoring

Turned game logic around, simpler now (no more differential equations).

Also some refactoring to make code more robust and flexible.
More major changes

It works even better now
Merge pull request #1 from CaptainHennessey/0.1

pull 0.1 into master