user can now remove event sessions from new events
Add db:test:prepare to script/bootstrap
Refactor user controller
Denormalize min/max session start/end times on event
Totals at top of check in page should update as volunteers are checked in
Merge branch 'rsvp-confirmation-mailer' of https://github.com/k-stewart/bridge_troll into k-stewart-rsvp-confirmation-mailer
Merge branch 'chores/refactor-users-controller' of https://github.com/squanto/bridge_troll into squanto-chores/refactor-users-controller
Merge branch 'check-in-totals' of https://github.com/treble37/bridge_troll into treble37-check-in-totals
Restored ajaxyness of Check In buttons.

Check In / Un-Check In buttons update totals ajaxilly.
show volunteer childcare requests in organizer console
Only send confirmation email to volunteers

https://www.pivotaltracker.com/story/show/41278297