Add leaflet / map directive

Use it with geohashgrid,
use a local template like this : 
<div >
	<div style="height:20px" />
	<div style="position:absolute;overflow:hidden;width:100%;height:100%">
	<div mapgeohash data="agg.buckets" 
		mapid="YOUR LEAFLET MAP PROVIDER HERE" 
		center="[46.853,3.823]"
		zoom="5">
                </div>
	</div>
</div>