GEOMESA-237 Convert AvroSimpleFeature to WKB (for comments)

* Use WKB (Well Known Binary) instead of WKT (Well Known Text) for AvroSimpleFeature
* Results in 20x speedup on serialization/deserialization

PR up for comments...This PR shows what it would look like if we supported the old WKT version as well as WKB. If we want to move forward with just WKB we have to reingest avro tables.

For the 1.0 it may be nice to support just WKB. please comment.