Change tabular coach report description to 'progress by topic'
Merge pull request #1032 from rtibbles/coach_reports_landing_page_clean_up

Clean up Coach report landing page
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into refactor_main
Nove central server code for i18n into the i18n app, mark as "central server only"
Refactor common updates code into a base.html file that can be shared by all updates.
Move i18n-generated js files into js directory
indenting blocks
Making languagepackdownload run through updates app
Get update_languages to work with jsonp, current json output format
Add central/distributed testing info to the doc
Cleanup of jsonp logic on central server.
MVP Date Range setting on CSV Export.
Remove cruft.
Disambiguate front end date display.
Export to CSV with proper implementation of Django forms.
Merge pull request #1020 from bcipolli/refactor_main

Refactoring VideoFile and LanguagePack out of main, into updates and i18n apps, respectively
allow updating by switching to a branch
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into update_to_branch

Conflicts:
	kalite/management/commands/update.py
only add subtitles if they exist on disk.
Fixing search function; broken in node cache changes.  Need to sort for lowercase node_cache now...