Remove definition from patient data criteria descriptions

*Note: This branch fails on Travis, but passes locally; the specific issue is dropping data criteria on existing data criteria does not set the correct start and end dates, again only for the Travis jasmine specs*
#### Story ####
- https://www.pivotaltracker.com/story/show/62487958

#### Notes ####
- Update description to <code>edit_criteria</code> context, which simply splits the existing description on ', '

#### Screenshot ####
![screen shot 2014-02-07 at 2 33 29 pm](https://f.cloud.github.com/assets/456952/2113541/c287b0a2-902e-11e3-90ca-bfbb55752753.png)