GEOMESA-486 CSV to Shapefile REST endpoint

Implements webservice deployed through Geoserver that
* receives a CSV file
* guesses a type schema for the columns
* creates a shapefile using the guessed schema or a user-supplied one
* exposes the zipped shapefile for geoserver ingest
This is probably better set to false - we'll be ingesting these into geomesa anyway so no need to build an index here.