Renamed cache_translations to update_language_packs
Converted cache_translations to update_language_packs. Made language lookups more robust.
Updated language pack model to store subtitle meta.
Moved utils to shared where appropriate; fixed naming
Adding updated data file (this can be reused by master, so keeping in version control)
Updates to control panel, mostly to make them work on distributed server.
Merge remote-tracking branch 'upstream/release-0.11' into update_control_panel

Conflicts:
	kalite/templates/control_panel/device_management.html
Improved doc strings; update_language_packs is now an i18n master command of sorts
moved i18n commands into i18n management dir; turned i18n into central server only app
Including srt files with zipped language pack now
Deleted subtitle related fields from VideoFile model; deleted obsolete subtitle download command.
Cleaned up other references to subtitle models or old way of doing subtitles in codebase.
Got rid of command cruft; workaround for error
Got rid of command cruft; workaround for error
Tried to amend, couldn't due to previous push. Oops
Fixed bug with date filtering in cache-subtitles
Handle cases where subs or UI trans might exist one without the other; increment language pack versions based on subtitles as well now.
Renamed language pack version field
Capture errors from compilemessages
Merge branch 'bundle_subtitles' of github.com:dylanjbarth/ka-lite into bundle_subtitles