Tracks should be able to have multiple chairs
Not all controllers have a Cmsimple page reference
Bring in ActiveAdmin and convert all auth to Linkedin
Default ruby to 1.9.3
Precompile active_admin assets
Link out to the Cmsimple editor from activeadmin.
Submission -> Session
Undo rename
Eliminate the possibility of a double render when authenticating
Users can select a theme for their submission.

Closes #12.
Fix up attribute accessibility for the admin
Set up blanks for submission inputs in admin
Send a confirmation e-mail to session submitters
Track icon should be editable
Remove Social Enterprise track from seeds
Clean up filters and validations
WIP