Always Cohort Inline Discussions
Add cvs upload col head case req
Merge pull request #59 from edx/carol/DOC-1077-v2

Always Cohort Inline Discussions
Changes to cohort and content experiments doc to prepare for cohorted
courseware
Change terminology to experiment groups
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Continue making edits fr review comments
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CSV upload: remove column name case requirement
Merge pull request #84 from edx/carol/docs/csv_upload_MOD

CSV upload: remove column name case requirement
Merge pull request #69 from edx/carol/docs/DOC-1376

Cohorted courseware: Reword cohorts and content experiment overview/config in preparation