add acceptance tests for user profile pagination.

JIRA: FOR-492
Make TinyMCE more tolerant about HTML elements

STUD-1565
fixes templating error (LMS-2560)
Remove verify_html as it isn't supported in TinyMCE 4
Add support for raw HTML editor.

STUD-1562
adjust codemirror window on raw HTML editor
UI String  Updates for Raw HTML Editor Change

Modified the Raw HTML template text and the help string for the Editor
setting.
Tests for raw editor and minor wording changes.
Experiment with cell widths to see if images will appear
Merge pull request #3461 from edx/sylvia/docs/table_images

Experiment with cell widths to see if images will appear
DOC-275, location & Language columns

additional small typos and fixes
Merge pull request #3448 from edx/ahodges/documentation/DOC275

DOC-275, location & Language columns
Merge pull request #3460 from edx/release

Merging release back to master
Merge pull request #3458 from edx/jsa/user-profile-pagination-acceptance

add acceptance tests for user profile pagination.
Changes for batch add beta testers feature
Merge pull request #3390 from edx/ahodges/documentation/LMS2476

Ahodges/documentation/lms2476
Removed evil HEAD line
Merge pull request #3468 from edx/ahodges/documentation/chglogchgs

Removed evil HEAD line
HTML Editor Changes - Raw Editor

stud-1566