Allow resolving the map promises multiple times, as reported here:
https://github.com/tombatossals/angular-leaflet-directive/issues/199

https://github.com/tombatossals/angular-leaflet-directive/issues/199
Renamed example
Allow resolving multiple times the promises, as noted by @schmidh here:
https://github.com/tombatossals/angular-leaflet-directive/issues/199