Add geographic coverage to HydroShare resource
Add geographic coverage to HydroShare resource

This adds the map UI to HydroShare, which shows a box around
the area of interest submitted. It calculates this box from
the contents of the shapefile, which we declare as a
"GeoFeature".

See https://github.com/hydroshare/hydroshare/issues/2543#issuecomment-358096010

WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed,WikiWatershed/model-my-watershed