search: layout fix

* Fixes the shrunk search bar.

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
docs: installation on Centos

* Adds how to setup invenio as a Centos 6.5 user.

* Changes travis so it builds the docs and then runs the tests.

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>
legacy: fix for imports and module renaming

* Adds several missing models for new tables.  (addresses #1790)

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