!T - Adds Javadocs for generic maps, layers and objects
!T - Improves Javadocs for Gleed module
!A - Adds Javadocs for new Tiled objects, map, loader and renderer
Merge remote-tracking branch 'siondream/mapsapi' into mapsapi

Conflicts:
	gdx/src/com/badlogic/gdx/maps/tiled/TiledMapRenderer.java