Fixes logic that disables prev/next question btns
Fixes logic that disables prev/next question btns

(closes #2211)
Merge branch 'jbau-2211-prev-next-arrow-fix' of https://github.com/Stanford-Online/class2go into jbau-2211-prev-next-arrow-fix
Merge pull request #2212 from Stanford-Online/jbau-2211-prev-next-arrow-fix

Jbau 2211 prev next arrow fix
reverting fonts to Helvetica Neue by popular request
Merge pull request #2219 from Stanford-Online/giulio-retinize-2155

reverting fonts to Helvetica Neue by popular request
Changes course_membership checking decorator to redirect to login page

with redirect to originally intended page after login (closes #1883)
Shib support for this login redirect decorate
use view that does SSL upgrade/downgrade
a better way to do SSL upgrade/downgrade
Fixed zebra-light color to match surrounding light bg color
Make shib login case more robust

Handle shib failure case to remove redirect loop
Lessen confusing messaging
default redirect to referer
bugfix: message.message
remove text-rendering css attribute to clean up titles and speed up performance
style changes to radio buttons
Merge pull request #2221 from Stanford-Online/jbau-1883-login-redirect

Jbau 1883 login redirect
StudentExamStart in Django Admin

Searchable by student's username
Merge pull request #2230 from Stanford-Online/jbau-studentexamstart-admin

StudentExamStart in Django Admin
remember state in join button