Support for "past_"

Adding support for:
* past_week
* past_fortnight
* past_month

Adding additional seed data and updating existing test results.

![screen shot 2014-01-16 at 20 19 06](https://f.cloud.github.com/assets/1736807/1934509/7da899aa-7eeb-11e3-978b-e7c7692b3890.png)