* Transfered swissbib code from qrcode branch
* Enable QRCode module
* Add QRCode module as internal module
Merge branch 'feature/favorites' into feature/qrcode2

Conflicts:
	module/Swissbib/config/module.config.php
	themes/swissbib/css/swissbib.css
	themes/swissbib/templates/Holdings/holding-holding.phtml
	themes/swissbib/templates/Holdings/holding-item.phtml
	themes/swissbib/templates/Holdings/holdings.phtml
* Merge fixes
* Added js handler
* Added qrcode image
* Implemented qr code
* Changed visibility of qr code service methods
* Add text to qr popup
Merge branch 'feature/qrcode2' into development