Allow metadata to be passed when passing transform instead of WCS to get_coords_overlay
Avoid duplicating 0 and 360 in coordinate range for longitudes
Added unit test for get_coords_overlay, with custom transform and coordinate metadata.
Make sure we either pass wcs or transform/coord_meta to CoordinateMap
Allow initialization of WCSAxes from transform/coord_meta
Merge pull request #64 from astrofrog/overlay-meta

Better support for coordinate overlays