Removed all the old Tiled related stuff.

Also removed the rock resource prefab.
Added the new Tiled stuff.

-Also added a new scene to test and merge with without conflicts
Added the rest of what was in the TiledTesting branch before its previous deletion.
Merging the master branch (PR#24) into the TiledTesting branch for the changes.
Cleaned up the tiled stuff for the PrefabReference change.
Merged and Fixed things.

I merged from the master branch (PR#25).
I fixed the prefab script, making it a static class no longer inheriting MonoBehaviour.
More work on the tile stuff
Finished up some things for now.
Merging from PR#30 master
Merge pull request #31 from drobbs/TiledTesting

The Universe Ending Commit.