Unittest for big five scoring
Create Core Self inventory
Create Career Commitment inventory
Center "Take" and "View results" links in inventory table
Create Tolerance for Ambiguity inventory
Work on support for multipage forms (incomplete)
Finish FiroB except for scoring and results

Support for multipage inventories is nearly complete.
Correct interpretation of reverse-coded

Now, for a 1 to 7 scale, reverse(5) = 3, reverse(6) = 2, .etc.
Before, I was doing reverse(x) = -x which I think is completely wrong.
FIRO-B: compute_metrics and two tests
Small fixes

- Error on inventory submit
- "View Results" not appearing
- Change cell widths in inventory-table
FIRO-B: barebones results page

Also, the submit button in the `take_inventory` view now says "Save and
continue" rather than "Submit" if the user is not on the final page of
the inventory.