GEOMESA-270,269,254 Improve ingest in geomesa-tools,

* Fixed up csv parser in SVIngest so that quotes are not requried
  around geometry field, updated readme.
* Ingest command now splits up into subcommands per format.
* Added dependency CsvReader for tsv/csv parsing
* Added back lat/lon field csv/tsv ingest method for adding point data
It may be better for testing purposes to have ```parseFeature``` return a lazy iterator of ```AvroSimpleFeature``` and then have a ```writeFeature``` method so that they aren't intertwined if possible