Ported to sqlite3 and Ubuntu. Removed test run warnings.

Overview:
 1. **capybara-webkit** broken **bundle install** on (my) Ubuntu box so made it conditional.
 2. Ported repo to **SQLITE3** (changed 1 line).
 3. Removed five shoulda_matchers WARNING messages.
 4. Moved back to Postgres database.

UPDATE: Undid step 1 above after removing QT5 from my Ubuntu 13.04 laptop.