disable download links; point to wiki install
Don't install any zone on setup.
Merge branch 'release-0.10.3' into disable_new_install
disable self-registration codepath
Merge pull request #1255 from bcipolli/disable_new_install

Disable new zip download / registration pathway
Merge branch 'release-0.10.3' of github.com:learningequality/ka-lite into 1258
Initial change for #1266: language pack availability, per version

Conflicts:
	kalite/i18n/management/commands/update_language_packs.py
	kalite/templates/updates/update_languages.html
VERSION is not a js var, but a template var.
Fixing small but important bugs in jsonp responses and language pack availability
Merge branch 'release-0.10.3' of github.com:learningequality/ka-lite into 1258

Conflicts:
	kalite/i18n/management/commands/update_language_packs.py