Merge pull request #2409 from edx/markhoeber/documentation/fix-data-config

Markhoeber/documentation/fix data config
Add '' default to bodyclass in courseware templates

This prevents from having a 'None' CSS class in the <body> tag when no
css_class is defined for the course.
Added sphinx_rtd_theme to requirements
fix typo in the data docs readme file
Add Matt Bachmann to authors file
Merge pull request #2411 from edx/will/fix-docs-build

Added sphinx_rtd_theme to requirements
Pinned version of sure library
Merge pull request #2420 from edx/will/fix-sure-install-failure

Pinned version of sure library
Fix cleanup .pyc file command in rake test
Remove warning about LTI not working in Preview mode
Merge pull request #2392 from edx/gprice/fix-unread-tooltip

Fix unread comment count tooltip rendering
Merge pull request #2361 from edx/will/bok-choy-upgrade-and-lms-tests

Bok-choy upgrade, LMS tests, cleanup
i18n input field on login page (LMS-2159)
Merge pull request #2424 from edx/will/fix-rake-test-cleanup

Fix cleanup .pyc file command in rake test
Add failing test for different capitalizations of language codes coming from the browser
Handle mixed case language codes coming from the browser or in dark-lang configuration
Pass component display name to Mako template

STUD-1241
visual styling adjustments to component header
Fix find courses page title in bok choy test suite
Merge pull request #2377 from edx/gprice/forum-thread-pagination

Add pagination of responses to forum threads