Add coord_to_mbtiles
Add wkt_to_bounding_boxes + passing test
Add test for multipolygon case on utils.wkt_to_bounding_boxes
Add polygon.wkt as sample wkt, add passing tests for wkt_to_mbtiles and wkt_to_uniq_tile_nums
Remove stuff in test dir; add test to gitignore
remove remaining test left over pngs
Remove legacy code
Added sample.mbtiles
Add readme