Added templates for the XML ouptut's prologue and epilogue, for MARCXML, NLM, and RSS.  (DC uses default sanity prologue/epilogue.)
Added templates for the XML ouptut's prologue and epilogue, for
MARCXML, NLM, and RSS.  (DC uses default sanity prologue/epilogue.)

tiborsimko/invenio-records,tiborsimko/invenio-records,inveniosoftware/invenio-records,inveniosoftware/invenio-records,tiborsimko/invenio-search,tiborsimko/invenio-search,inveniosoftware/invenio-search,inveniosoftware/invenio-search