base: padding removal from top of Flask-Admin page

* Removes padding on top of Flask-Admin page.  (PR #2201)

Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>
installation: testing of development requirements

* Adds list of repositories with developement version of some of the
  most important libraries Invenio is depended on.  (addresses #2044)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
template: deprecated blueprint_is_module function

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>