Display hierarchical place names (publication places, field 752)

* MARC-driver method to read fields and return display value
* display content in description tab
* title translated in en, fr, de, it

The display is untested in the two views, as we use a different theme. If anyone uses field 752, this could be a useful addition to VuFind.

See also: 
* original commit: swissbib/sbvf2@72bd49c72060c73f58881e42d83613bbb42c39d8
* our own issue: swissbib/sbvf2#321