Release notes for week of 11/19/14

@srpearce , @mhoeber , @catong please let me know if your teams are releasing other interesting features and fixes this week.
@rlucioni , FYI as release master.
@griffresch , please review the Coming Soon section.
The addition of the `Using the Course Wiki`_ section (or "The addition of a section on <link>using the course wiki<link>").