Added Natural Earth world 1:50m in World Van der Grinten I projection
Switched to rendering whole world in World Van der Grinten I projection
Fixed a line/polygon rendering error
Tightened world rendering extent
Added lakes and U.S. state borders, removed Antarctica
Limited lakes to only the big ones
Added support for ISO 3166-1 Alpha 2 codes
Added support for any GeoJSON geometry in source coverage
Cleaned up a small bit of drawing code