Renamed CongressHouses table to Chambers

CongressHouses was an awful name for a db table Chamber is better.
Also went and changed name where necessary
Relations in models better defined

Relations in the models are set up. Also having the last vestiges of
congress_house eliminated
Seeding of database redone.

Database seeding now also fills up lookup tables dynamically as well as
the other tables except for the tag and user tables.
Added new feature cukes

Features for Login and Registration have been added.
Feature file for search

Cuke for search functionality