improved similar author matching (finds non-accented version when an accented form is presented, but not yet the other way around), and better matching of letter c plus accent.
improved similar author matching (finds non-accented version when an accented form is
presented, but not yet the other way around), and better matching of letter c plus
accent.

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