GEOMESA-433,GEOMESA-434,GEOMESA-484 Develop raster and ingest handling c...

...ode for integration with GeoMesa. Implement raster ingest as a new maven submodule. Create a new Store for raster data.
You're right. I just copied this file here and plan to re-factor it based on what we exactly need for registering raster coverage to geoserver. Will change soon.