BibEdit: add email notification on submit
BibEdit: add email notification on submit

* Adds e-mail notification to users after submitting an update
  using the bibtask "email-logs-to" parameter.

Signed-off-by: Jan Aage Lavik <8d55e006a1b29770f275a5c59a7341f17f8e69d5@cern.ch>
Reviewed-by: Samuele Kaplun <2e218f779e12714c314fad8ebf6b3041daa21337@cern.ch>

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