Adds geocode_file() and geocode_file_job() which geocode a file of addresses using the BatchGeocode job endpoint. Results are written with write_geocode_result() and read with read_geocode_result().
The world_geocoder object has been deprecated in favor of world_geocoder() function
Resolves an issue parsing geocoding results with fields that are not present in the world geocoder. Fixes #41 https://github.com/R-ArcGIS/arcgisgeocode/pull/42
bldg_comp, struct_type, struct_det to output to address newly added fields in the world geocoding service4.2default_geocoder() would not work without attaching the entire package. See https://github.com/R-ArcGIS/arcgisgeocode/issues/23.