Case Grouping UI for TrialConnect, now under a previewer feature flag and ready for UAT -> QA

![screen shot 2013-09-20 at 4 47 13 pm](https://f.cloud.github.com/assets/716573/1183734/fcca8ecc-2235-11e3-94be-39bc4b1f20b4.png)
![screen shot 2013-09-20 at 4 47 42 pm](https://f.cloud.github.com/assets/716573/1183735/01b6c1c6-2236-11e3-8191-dea5e6bc5d42.png)
up next is excel upload...