Rewrite of MultiBackend driver with separate functions for all ILS driver methods. Fix to checkCapability to work properly with drivers using __call() magic method and more data to supportsMethod() for better decision-making including the possibility to use supportsMethod also without _call(). Updated MultiBackend tests.
VuDL test stash
Advanced search control links now on their own line.
Merge branch 'release-2.3'

Conflicts:
	themes/bootstrap3/templates/search/searchbox.phtml
Updated translations.
Updated translations (courtesy of Christian Dabrowski and Arek Danszczyk).
Merge branch 'release-2.3'
Restored code lost in merge.
Progress on VuDL tests.
Restored change that triggered the need for the restore in the first place.
Added language fallback to 'en' in addition to the existing default language.
VuDL Solr Connector test.
Merge branch 'vudltests'
Merge pull request #204 from KDK-Alli/default-lang

Added language fallback to 'en' in addition to the existing default lang...
Don't analyze VuDL test suite in phpmd.
Expanded AbstractBase coverage.
Rounding out formatDetails tests and have some VuDL fixes. TESTING WORKS.
Style fixes.
Style adjustments.
First half of tests for VuDL Fedora Connection.