Assertion Error fix
Doors working, any structure can be built.
Merge branch 'master' of https://github.com/enricozb/Split-Worlds

Conflicts:
	SplitWorlds.pde
	build-tmp/SplitWorlds$Door.class
	build-tmp/SplitWorlds$GameObject.class
	build-tmp/SplitWorlds$Man.class
	build-tmp/SplitWorlds$MovingPlatform.class
	build-tmp/SplitWorlds$Platform.class
	build-tmp/SplitWorlds$Spikes.class
	build-tmp/SplitWorlds.class
	build-tmp/source/SplitWorlds.java
	level0.txt
Color system added

Need to select color palettes.
github fix
Merge branch 'master' of https://github.com/enricozb/Split-Worlds

Conflicts:
	SplitWorlds.pde
	build-tmp/SplitWorlds$Door.class
	build-tmp/SplitWorlds$GameObject.class
	build-tmp/SplitWorlds$Man.class
	build-tmp/SplitWorlds$MovingPlatform.class
	build-tmp/SplitWorlds$Platform.class
	build-tmp/SplitWorlds$Spikes.class
	build-tmp/SplitWorlds.class
	build-tmp/source/SplitWorlds.java
	level0.txt
	level1.txt
Github nonsense