BUG: Fixed transverse mercator attributes
Merge pull request #22 from cpelley/fix_transverse_merc

BUG: Fixed transverse mercator attributes
BUG: Corrected longitude at central meridian
Merge pull request #23 from cpelley/fix_transverse_merc

BUG: Corrected longitude at central meridian
central_meridian instead of projection_origin in grid mapping
Merge pull request #24 from esc24/tmerc_alt

central_meridian instead of projection_origin in grid mapping
Added test data for reduced grids.