Added missing indexed fields:
* Group reference
* OG Vocabulary
* Node Access

Added extra Facet:
* OG Vocabulary
Replaced the discussions overview page by a Search API powered version.
Added overrides for the FacetApi block titles.
Added extra module to be the glue between Views & the capacity4more profile.
It provides views plugins and handlers that are not hard linked to the capacity4more modules.
Added views handler to include the search_api_sorts block into the header of a view.
Added views handler to include the search_api_sorts block into the header of a view.
Added the "Add a Discussion" & "Sorts" handlers to the header of the Discussions overview.
Exported the default search_api_sorts configuration.
Added the search_api_sorts module to the make file.
Fixed missing dependency + fixed handler to show the "Node Add" button.
Adding tests
Updating demo content:
- Added extra user "alfrednobel".
- Added extra group "Nobel Prize".
- Added discussions in the "Nobel Prize" group.
- Added missing "Topics" to the Discussions.
- Added missing "Type of Discussion" to the discussions.
Granted all users the permission to sort the search_api search results.
Added extra test steps to the "Discussions overview" feature.
Fixed permissions & demo data.
Removed @wip tags.
Moved views handlers to the proper subfolder.
Fixed behat tests.
Merge pull request #230 from capacity4dev/feature/CFD-167-Group_Discussions_Overview

Feature/cfd 167 group discussions overview
Merge remote-tracking branch 'origin/develop' into feature/CFD-148-Move_quick_post_and_activity_stream_to_group_dashboard

Conflicts:
	capacity4more/behat/features/bootstrap/FeatureContext.php