This should increase the performance for most search operations such as
WITHIN, INTERSECTS, and NEARBY when dealing with complex polygons.
Geofencing should see a increase in throughput when dealing with a high
frequency of point -> polygon detection.
Addresses #245
Removed map[string]interface{} for Feature type.
Replaced "encoding/json" with "tidwall/gjson" for parsing.
Removed ablility to serialize to binary. JSON only.
