Don't use grouping when no products are been requested
Merge pull request #9 from gsegura/master

Blacklist facet filter elements
Fix some unit tests
Fix missing brand name in results
Temporarily move fl to invariants
Re-organize search UI
Make priority fields optional in the UI
Fixed fields order in the UI
Updated property section name
Adding default mm (mininum "should" match) param
add try/catch statement wrapping code that re-index rules to do a
rollback in case of that exception
Merge branch 'master' of github.com:gsegura/opencommercesearch