October 15, 2014 Release Notes

@srpearce @catong  @benpatterson   draft for tomorrow started

@explorerleslie   not sure where we stand or reruns today, not mentioned yet.
Seconding @lamagnifica - ECOM is making this change official (register: create an account on edX; enroll: sign up for a course) this week or next. ("making this change official" entails changing all the text on edX.org to be consistent; I've filed JIRA tickets for this.)