- avoids problems with e.g. combined search, permissions handling.

Smoother "must be logged" translation

- problems could be caused by trailing separators in MARC 505$t - e.g. for subfield $t content "abcde -- " this would result in ["abcde", " "] eventually displaying an empty row in TOC-tab

- Don't require non-empty catalog password (some ILS systems don't need a password).

Remove cat_password check in Shibboleth Auth Plugin

Disable xdebug in Travis build.

* remove cat_password check in Shibboleth Auth Plugin as not every ILS requiress a password (consistent requirements according to ILSAuthenticator)

There is an error parsing $amount in case of having the 'z31-credit-debit' field in custom language, because the z-31-sum is multiplied by $mult, which is undefined as it didn't have any default value yet

- First step in "VuFind" source cleanup; see VUFIND-1139.