Adds expire/renew admin commands to userbits
Makes teacher list in Directory bulleted
Fixes deselecting priority classes

Resolves Github ticket #415.

The issue was related to calling ESPUser.getSections with type
referring to a list of RegistrationTypes rather than names of
registration types.
Merge pull request #562 from gkanwar/gurtej-stable-release-3

Gurtej stable release 3 fixes