germania-sacra: improve ~search

* extend timeout to 30s
* match with ~0.7 instead of ~0.5
germania-sacra: display page number before URL in bibitem
germania-sacra: bibliography - Prefix for links
germania-sacra: bibliography – no comma between series and volume number
germania-sacra: bibliography – no publisher, no comma after publisher address
germania-sacra: bibliography – no comma between journal and volume number
germania-sacra: bibliography – remove erroneous space after web page date
germania-sacra: fix conditions for GS Band Link creation: no <a> when there is no URL