Fixed bounds to check if valid correctly and to fix errors
Check the watch variable of the markers for any objects inside, so we can delete all markers if the user passes an empty object.
Merge branch 'master' of https://github.com/tombatossals/angular-leaflet-directive

Conflicts:
	dist/angular-leaflet-directive.min.js
Merge branch 'bounds' of https://github.com/bzmwillemsen/angular-leaflet-directive into bzmwillemsen-bounds

Conflicts:
	dist/angular-leaflet-directive.min.js