Ahodges/doc/cohorts

@explorerleslie , @nasthagiri , @andy-armstrong , @gwprice , @jimabramson , @dan-f , @cahrens, @srpearce  , @WatsonEmily , @mhoeber 
The cohorts/cohort_config and cohorts/cohorts_overview files and images are pretty solid. Questions occasionally in comments.
I'll work on the section describing moderating discussions in a cohorted universe next.
Interesting. We use the term throughout the Building & Running guide (example links below). We don't use "LMS", and Jane actually was the one to suggest this term. It also appears in Studio on the View Live buttons that allow you to view a course in the LMS, regardless of where you are in relation to the start date (or end date) of the run. 

http://edx.readthedocs.org/projects/edx-partner-course-staff/en/latest/developing_course/controlling_content_visibility.html#release-dates

http://edx.readthedocs.org/projects/edx-partner-course-staff/en/latest/running_course/course_staffing.html#assign-staff-roles