Rename `normalized-rating-sets` to `normalize-rating-sets` in the tests
as well.
Rename all `-test` namespaces to `-expectations` namespaces.

- And change the filenames as well.
Fix a test in `rating_set_expectations`
Add a travis configuration file.
Refactor the tests a bit
Add functions to setup, migrate and tear down the database.

- Need this for testing against the database.
Add an `all-except` function to the user ns.

- To query for all the users except for the current user.
- Add an expectation (that hits a test DB) to test this function.
Don't show a rating box for the current user.
Create the test PG database in the travis config file.
Merge pull request #2 from nilenso/tim-and-asifs-second-day

Tim and Asif's second day