Merge branch 'release-0.11' of github.com:learningequality/ka-lite into develop
Fixing up HTML to be compliant, according to http://validator.w3.org/
Merge branch 'release-0.11' of github.com:learningequality/ka-lite into develop
Merge pull request #1070 from bcipolli/khanload_update

Khanload & topic tree update
fixing decorator bug and other bugs long fixed ago
add new arguments for update_language_packs, specifically to use a local
zip files as source
fix some wrong use of builtin libraries
look at name of zip file to determine language being processed
reenable SRTs (disabled during dev)
Merge branch '1067' of github.com:aronasorman/ka-lite into lang_code_consistency

Conflicts:
	kalite/i18n/management/commands/update_language_packs.py
Updates to resolve merge issues between branches, extend functionality.
remove empty start callback
use sprintf.js
refactor -- place both adding installed languages and showing
installable languages into a single function
cleanup on some use of sprintf
factor out code that starts language pack download into its own function
solve issue #1118: Add upgrade link if a central server version is higher
Merge remote-tracking branch 'refs/remotes/upstream/release-0.11.1' into 1118

Conflicts:
	kalite/templates/base.html
Merge remote-tracking branch 'refs/remotes/upstream/release-0.11.1' into 1067
Retrieve network adapter IP addresses, and show them on easyadmin page.