BibIndex: wash input phrases for UTF-8
BibIndex: wash input phrases for UTF-8

* Plugged wash_for_utf8() into all indexes; this should fix all the
  Unicode indexing troubles and exceptions at the price of some
  indexing performance due to repetitive washing.

* Note that full-text index may not be washed very effectively either;
  this should be fixed in during the textification phase when washing all
  the ligatures and friends, which is a separate task (see #317).

inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio,tiborsimko/invenio