First draft RelNotes for Nov 5, 2014 release

@mhoeber @srpearce @lamagnifica @explorerleslie @shnayder 
Here's a first draft of release notes -- please review. 
A known issue is that the link to the Developer's Guide is broken.
These three bullet points should be parallel - I'd change the first to start with "Added a new email template" and the second to "Added cautions to make course teams aware".