minor step forward

properly parsing area.  not passing to couchCacher correctly
tests passing for area query

I can ask for all detectors in an area, and get either the list of
detectors (if json output) or the aggregate detectors (if csv output)

Really only tested for counties, monthly, and fresno, but the test
passes and is pretty thorough
Merge branch 'bug/selectarea'

* bug/selectarea:
  tests passing for area query
  minor step forward
  recoded to use shapes_postgis