general: fix for default PACKAGES

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

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
installation: setuptools-bower from PyPI

Signed-of-by: Yoan Blanc <yoan.blanc@cern.ch>
search: facets per collection configuration

* Adds initial configuration with fixtures.

* NOTE to get facets shown
  invenio_demosite.base.fixtures.websearchh.FacetCollectionData needs
  to be loaded which means that you either need to recreate DB or
  load them manually.

Signed-off-by: Kamil Neczaj <kamil.neczaj@cern.ch>