Organize j3o files, Added World scene j3o, Added NavMesh

Organized the j3o files into the scene objects (ground, trees, buildings) and added NavMesh to this j3o file
Added World j3o file that includes the scene j3o, jaime j3o, lights, and sky

Added NavMesh navigation along with dpad.  If touch on a point on the ground, character will use NavMesh to move to that location.  Dpad is disabled while NavMesh is active until NavMesh finishes.
*** IMPORTANT - ADD SDK PLUG-IN FOR AI IN ORDER TO RUN PROJECT ***