Typofix
Renamed markercluster packages, as mentioned by @wdabrowski here:

https://github.com/tombatossals/angular-leaflet-directive/pull/374
Merge branch 'patch-1' of https://github.com/wdabrowski/angular-leaflet-directive into wdabrowski-patch-1

Conflicts:
	examples/markers-clustering-without-overlays-example.html