Trigger notice when sync fails due to config

When the SAML assertion is for a user that is not present in the
MediaWiki database, and auto creation is off, trigger a notice
Renamed "autocreate" to "autoCreate"
End sentences with full stop

as recommended on
http://www.mediawiki.org/wiki/Localisation#Use_full_stops
Fixed indentation
Large update

Better implementation of Mediawiki API.
- No MediaWiki cookies are set anymore; simpleSamlPhp does all session
management.
- No longer blocks the MediaWiki integrated login system
- No longer disables features for local users, only SAML users
- Button on login screen for SAML login
- No change of case for SAML users
- Direct SAML login on older Mediawiki versions (Ubuntu)
- Almost same API as before, legacy code ensures you don’t have to
change anything