Remove old custom mapping stuff
Fix compile errors
Add in OTM2 API class

This class should slowly implement all of the OTM1 interface as we move
into the promising new era of OTM Cloud
Add in MKTileOverlay and kill off the old stuff
Fix overlaping header issue
Make base url respond to changes in the active instance
Standardize on x, y for point dicts
Modify detail cell to handle geom
Add support for viewing fields

Loads from the instance config endpoint. Editing not yet supported but
will be added in the future.
Merge pull request #46 from azavea/topic/fields-for-viewing

OTM2 integration