Moving updates landing page to have a naming convention like in other apps, removing duplicate function definition
Restructure update templates to share more common code.  Indent code as proper templates.
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into updates_template_updates
Distributed server templates: fixing up indenting, scrubbing {{ block.super }} and trans wraps
Central server templates: fixing up indenting, scrubbing {{ block.super }} and beginning trans wraps
Fixing blocking syntax error and bad design on limiting command/
Merge branch 'update_language' of github.com:bcipolli/ka-lite into updates_template_updates

Conflicts:
	kalite/templates/exercise.html
	kalite/templates/updates/base.html
	kalite/templates/updates/update_languages.html
	kalite/templates/updates/update_videos.html
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into updates_template_updates
Merge branch 'update_language' into updates_template_updates
Merge pull request #1074 from bcipolli/updates_template_updates

Updates template updates