Migration to Mapbox Tile Layers and new API Endpoints

* Removed legacy TopoJSON endpoints
* Added new API path and migrated, redesigned batch endpoints
* Updated Mapbox map to use new endpoints
* Updated minority circle draw updates to no longer require data load
* Updated function order on page load to avoid bounces, present correct map height
* Updated URL structure to reflect new changes
* Removed Topo / Layer Testing cruft