Not working properly for custom CRS

[jpuerto]

Hi,
I've open an issue for Leaflet but seems like the problem has to be solved here due to limitations
Leaflet/Leaflet#2946

The problem I have is that I'm using a custom CRS and this plugin is using LatLng.distanceTo() method to calculate the distance between points. This is not working properly in my use case as this value is always calculating the value with the Earth CRS:

distanceTo: function (other) {
return L.CRS.Earth.distance(this, L.latLng(other));
}

The plugin should keep an instance of the configured map and use ´´´map.distance(latlng1, latlng2)´´´ to calculate the distances, this way it will use my custom CRS to calculate the distances.

Salu2.