BibFormat: use default namespace in XSL
BibFormat: use default namespace in XSL

* To be compatible with MARCXML records stored in the DB sometimes
  with or without namespace (and to be backward compatible with
  existing XSL templates), ignore MARCXML namespace of input records.
  See also:
    <http://plasmasturm.org/log/259/>
    <http://www.perlmonks.org/?node_id=530519>

* Also process input MARCXML to identify empty indicators with a
  space character, in case it is still stored in the old way in
  the bibfmt table.

inveniosoftware/invenio-formatter,inveniosoftware/invenio-formatter,tiborsimko/invenio-formatter,inveniosoftware/invenio-formatter,tiborsimko/invenio-formatter,tiborsimko/invenio-formatter