xblock-discussion: update hash
mattdrayer/api-user-preferences-delete: Added new Detail view, GET/DELETE operations
Merge pull request #132 from edx-solutions/mattdrayer/api-user-preferences-delete

mattdrayer/api-user-preferences-delete: Added new Detail view, GET/DELET...
course users can be filtered by organizations
handle exception if user never accessed any course module
Merge pull request #131 from aboudreault/cohorts-workgroup-group-project

Cohorts workgroup group project
Merge pull request #135 from aboudreault/cohorts-workgroup-group-project

Import missing
Merge pull request #133 from edx-solutions/ziafazal/filter-course-users-by-orgs

course users can be filtered by organizations
Merge pull request #134 from edx-solutions/ziafazal/fixed-error-on-course-metrics

handle exception if user never accessed any course module
Upade group project xblock hash
user count in cities by course
Merge pull request #136 from edx-solutions/ziafazal/course-users-count-by-city

user count in cities by course
Add tests to ensure discussion thread creation works as expected