Merge pull request #1461 from GawainLynch/hotfix/loadConfigFile

Handle empty config.yml files in loadConfigFile()
Merge pull request #1462 from rarila/ui-work-3

Ui work 3
Reverting one small change components/pager.twig -> _sub_pager.twig

Pinging @rarila. This change was causing the frontend to break, So i’ve
reverted it for now. :-)
added docs for facebook configuration
added button template withous inline css and button invocation function
added return to referrer page for auth plugin
added missing function/page for visitor settings
spasing changes
version update
update template variable defaults
refactored logic for extra openid params
Revert "update template variable defaults"

This reverts commit 1e07d75c5647270e6d6a5dec9f21cf2da9133511.
update template variable defaults
Merge pull request #1463 from jadwigo/master

authenticate referrer, facebook etc.
Changing "col-sx-12" to "col-lg-12"

Or was this a deliberate change, @rarila? if so, I can revert it..
Minor CSS tweaks.
add composer ui package
add to main nav
add to main backend controller
add a view