Address cluster

Add the `geocoder_address` option which allows a sinlge street to have an HSTORE of number --> geojson point geometries. This significantly increases indexing speed and the number of indexed features.

A test case reduced a database of 2 million indexed features down to 75000 indexed features.
Want to add tests for the non-matching return cases?

- If there's no matching address point
- If there corresponding geom is not a geojson point