Added additonal args to TransverseMercator
Added tests
Review actions
Fixed failing image tile test.
Merge pull request #309 from esc24/tmerc_fix

Added additonal args to TransverseMercator
Merge pull request #313 from pelson/img_tile_fix

Fixed failing image tile test.
Added Mercator (EPSG:3395) projection. Note this file is crs.py from branch WorldMercator
Review actions: reducing scope of PR. Pertinent tests changed to update Mercator() call