Removed unused constants
changed noisey log level messages to debug
* This bumps the size of the size of the MapTileCache in the abstract TileProvider by 100 tiles.
* I've disabled the handleTile method in the ZoomInLooper as well as the ZoomOutLooper so that they no longer do anything.  This forces tiles to load from disk or network instead of trying to rescale pre-existing tiles and storing/loading them from an LRU cache which may evict tiles.
I've added Map and Cover prefixes to the tile overlays so that you can see which tile are actually being used.