Added a management command for assigning talks to groups
Merge pull request #316 from alex/assign-groups

Added a management command for assigning talks to groups
Fixed issue with "become a sponsor" button being covered up in page head.
page head fixes.
removed extra whitespace below top banner on login/signup pages
button color fix on sign up and login pages.
Correct deletion of additional speaker
Merge pull request #318 from PyCon/remove-speaker-bug

Correct deletion of additional speaker