parameterized android and google play versions
Added GeoDataRegistry.

A registry that uses the external storage directory (sdcard) for loading data.
rendering tweaks
api updates, identifier bug, added gpkg as primary alias
added mbtiles support
added dependency on geojson module
added dependency on carto module
updating on map size change
reprojecting vector layers, and not requiring a matching rule for tile sets
exposing GeoData file through static method