Update search results:
- add new ResultHeader block with links to the two result pages
- rename Facets block to StoreFacets (linked to StoreResult block)
- add new Facets block (link to Result block) including the document facet
- include ui-bootstrap JS library
- delete typeahead JS library (replaced by ui-bootstrap)
Replace deprecated visible-* classes by visible-*-* ones.
Include code for visible-*-* classes in bootstrap-override.css.