fixed east and west mixed up which breaks KML, added area test which is how found it
better crs support
fixed crs support for overriding area
allowed for None setting for epsg
No projection as default to not break current usage. Selectable output projection
describe dstepsg and srcepsg better
made pyproj optional, not sure if like stderr with tests though, better way?
fix typos
cleaned up test requirements
fix issue with using internal points for _ranges, need to clone if convert
nicer looking test for proj, weight at 0,0 highlights current translation issue