need at least v0.13.3 for mongoalchemy
Many changes to facets, back-end system and JS

Hierarchical facets ajax powered
many changes also to the back-end system and to the templates
fixed bug with JS search form
Removed refereed flag from search form.
Tests
Various improvements:
Upgrade to Bootstrap 2.3.1
export of papers to ads classic
bug fixes due to upgrade to jquery 1.9
Export of list of results to adsClassic also in citations and reference
updating default solr url to point to new haproxy instance
use mongo auth functionality
not the actual password anyway, but still no need to have it here
Facets support for "and"/"or"/"exclude"

Support for logical operation between facets of the same group.
Minor upgrades to the ui
Tests for new basic query components and new template filters
Monkey patch for invenio test to avoid a real connection to the database
Small change to config
titles replaced with tooltips to give more infos
Small bug fixed
added volume, issue, page to default api fields
Small change for some titles missed
Working on year facet