Added spec for response object hstore
Refined spec
Added hstore extension to db

Added response_object column to entries table
Tweaked specs to make them consistent

Added generate_response_object
Added rake task to update all records with their response_object
Added redis-rack-cache gem to avoid bs error messages about redis on the server.
Ironed out problems with using hstore to grab the response_object, in order to transition to using hstore for experimentation.
Merge pull request #21 from thomasgwatson/hstore

Hstore