renamed Registry to EventBus and made Event an interface
made EventBus able to be instantiated
fixed java-doc
beginning of refining gui components
fixed grammar mistakes
small changes
Table now using EsotericSoftware's powerful TableLayout
made Group into an handler itself
removed old org.gamelib.ui package as replaced by gui
Merge branch 'master' into gui

Conflicts:
	src/org/gamelib/backend/Input.java
Merge pull request #4 from pwnedary/gui

Gui
renamed org.gamelib.gui to ui
removed TODO
moved org.gamelib.net to org.gamelib.util
images are now Drawables as it just makes sense
handler Groups doesn't auto register to EventBus.instance().main anymore
fixed Java2DBackend not stopping when invoking stop()
... now fixed it.
fixed misleading java-doc
drag event no longer saying no button is down