This commit adds support for selection of geo region on the bettermap panel. Tother with this extra feature, I have also: updated leaflet, updated the marker cluster plugin, made the OSM url a configuration option, updated the filterSrv.js file to support geo_polygon filters, updated the filtering panel to support geo_polygon filters.
Merge branch 'master' of github.com:eriky/kibana

Conflicts:
	src/app/panels/bettermap/leaflet/leaflet.draw.js