Added helper class to get a group based on the current context.
Added 2 new facet block types for the Categories & Tags.
Changed the way hierarchical fields are indexed: we now also index all the parent terms as being selected (Group metadata + Region & Countries)
Replaced the sidebar "Og Vocab" facets by the "Categories" & "Tags" facets.
Added new field widget to show the facets grouped by the root level items.
Update tests for the splited OG Vocal facet.
Merge branch 'feature/CFD-167-Group_Discussions_Overview' into feature/CFD-202-Split_OG-Vocab_facet
Fixed demo data so we do have geo tags on discussions.
Sort the Regions & Countries terms by term weight.
Used load multiple instead of loading one by one.
Merge pull request #232 from capacity4dev/feature/CFD-202-Split_OG-Vocab_facet

CFD-202 : Split og vocab facet
Merge remote-tracking branch 'origin/develop' into feature/CFD-156-Quick_post_update_activity_stream