installation: Flask-Gravatar version 0.4.0
installation: Flask-Gravatar version 0.4.0

* NOTE: Updates version of Flask-Gravatar. Please run
  `pip install Flask-Gravatar==0.4.0 --upgrade`.

Signed-off-by: Jiri Kuncar <2bdffcb416fed3002465740d19a053a39918cbe5@cern.ch>

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