Fixes #297. Folder description was not being sent by frontend app
Add test to verify folder description is saved at create time
Fix bug in client side group test spec logic resulting from CSS inclusion

Also fix filename for timestamped screenshots to be filesystem compliant
Attach screenshots to dashboard on jasmine failure
Use more descriptive name for cdash measurement image
Add pep8 to our pip dependencies
Add explicit wait for event binding on group page
Merge pull request #299 from girder/folder-description

Fixes #297. Folder description was not being sent by frontend app