Eliminated unused parameters.
Created shared base class for QR code and cover loaders.
- Added QR code test
- Adjusted QR code loader to use more consistent public interface
Added missing test line.
Style fix.
Touch compatible Zoomy.
List order bug in VuDL.
Merge branch 'release-2.3' of https://github.com/vufind-org/vufind into release-2.3
Merge branch 'release-2.3'