Edits from Alison's initial review

DOC-34

Consolidate information from data.edx.org, Appendix E, and problem types

Improve dump_course_ids test for unicode course_ids

Fixed confusing docstring

missed rst

CSS changes regarding TinyMCE in annotation tool & accessibility issues

Support publishing of nested xblocks

Allow uppercase transcripts srt extension.

Fix split_test xblock so that it can render in Studio

Added internal refs to help researchers find the data format files

Update data download dash for parity (LMS-1203)

make widget accept usernames or emails (LMS-1438)

Fixes STUD-1434 by including the CodeMirror css mode in codemirror-compressed.js

Support unicode in course ids when dumping all courses

codemirror-compressed.js

Ahodges/documentation/studentdata

LMS-1203

In addition to email addresses. LMS-1438

Fixes: AN-657

This change addresses STUD-1403 where split_test modules could not render in Studio.
It changes Studio to pass a new parameter 'runtime-type' of 'studio' when rendering
 an xblock. In split_test, this will then cause all of the children to be rendered,
 rather than just the one that matches the conditional.

As per request #2898, changed the css for annotator tool to affect tinymc only when in annotator-wrapper.

Also removed the outline:none for accessibility requirements and
removed two redundant css files from lms.

https://edx-wiki.atlassian.net/wiki/display/ENG/Release+Page%3A+2014-03-12

mentoring data export: Only export answers from the current course