Major changes:

* #404 (Add tooltips to facets on start page)
* #419
* [ticket:227 better handling of multilingual elements]
* [ticket:383 Provide a description for facets]
* #422 (new "modality" facet)

minor:
* #423 (Show 30 results per page)
* #441 (Allow fulltext search on Header)

milestone:VLO-2.17