Function followMyLocation

followMyLocation(options?): Promise<JLocation>
JMap.Geolocation.followMyLocation

Returns the user current location if promise succeed, pan and zoom to this location and starts monitoring the user location.
Parameters
- Optional options: JPanAndZoomOptions
  pan and zoom options
Returns Promise<JLocation>
Throws
if browser doesn't support geolocation, if geolocation is disabled, if an unexpected error occurs while getting location from browser

Example
```
// pan and zoom to the user location and start monitoring location updates
JMap.Geolocation.followMyLocation()
   .then(location => console.info("Paned and zommed to user location ", location))
   .error(error => console.error("Cannot get my location : ", error))
```