1) initial design for authentication with either Shibboleth or MultiILS/ILS as basic methods to store a user identity in the VuFind DB
2) both authentication alternatives should enable access against several ILL systems to provide patron functionality for multiple ILLs
3) As this is in general already possible for MultiILS authentication method it's by now not possible in combination with the shibboleth method

This infrastructure should be the basis for https://github.com/swissbib/vufind/issues/18

More analysis necessary to provide full functionality
Merge branch 'development' into feature/authenticationExtended
Merge branch 'feature/authenticationExtended' into development