added GeoJSON tileLayer helpers and layerTypes
added GeoJSON tileLayer helpers and layerTypes
added GeoJSON tileLayer helpers and layerTypes
Merge branch 'tileLayerGeoJSON' of https://github.com/cktong/angular-leaflet-directive into cktong-tileLayerGeoJSON
feat(layers): Added the GeoJSON layer functionality by @cktong.

https://github.com/tombatossals/angular-leaflet-directive/pull/270