Added README to describe example usage
Added README to describe example usage

kozer/leaflet-tilelayer-geojson,ebrelsford/leaflet-tilelayer-vector,ebrelsford/leaflet-tilelayer-vector,nrenner/leaflet-tilelayer-vector,Livefyre/leaflet-tilelayer-geojson,jgimbel/leaflet-tilelayer-geojson,glenrobertson/leaflet-tilelayer-geojson