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>
global: Invenio-Demosite 2.0.0.dev20140725

* NOTE adds requirement to maximal Invenio version <1.9999.1 to detect
  API changes in development version.

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
installation: bower to manage the assets

* Defines .bowerrc for the static files.

* Adds base file to create the bower.json.

* Ignores the bower.json and vendors.

* Adds the Flask Debugtoolbar in extras_require.

* Adds setuptools-bower in extras_require.

* NOTE the demosite now requires Invenio==1.9999.1

Signed-off-by: Yoan Blanc <yoan.blanc@cern.ch>