From mcr@sandelman.ca:

  Refactor to remove dajaxice.
  Modified the URLs that address schedules:
    - urls now always start with /agenda, removing the mix of /agenda and /schedule prefixes
    - urls to a given schedule include the schedule owner (by email address)
  Corrected issue that prevented deleting sessions.
  Changed comment mechanism in timeslot_edit.js
  Migration to change the email address for (System)

  Fixes bug ietf-tools#1426

Commit ready to merge
 - Legacy-Id: 8229

Author: rjsparks