tree ef9c09e7e4b6bf9713937d1fdf2e3a8576e3504e
parent 52c22a8d178f4c266a8a073430f742b4ec663d72
author Marc Blank <mblank@google.com> 1268930909 -0700
committer Marc Blank <mblank@google.com> 1268944525 -0700

Send cancellation mail to removed attendees

* We now keep track of attendees in the Event's extended properties
* When a message is updated, we compare current attendees with the
  original list, and send cancellations to those who have been removed

Bug: 25623726
Change-Id: I7b3df99e62fb3d4a1482bd6d4612647f5bdb756a