#502 - Add tenant information to each activity entity
# 502 - Changed the actor and target for group-add-members

The entity resources are now as follows:
 * object = The group
 * actor  = The user who is doing the adding
 * target = The principal who is being added to the group.

Although perhaps not entirely semantically correct, this has been done
to keep some sort of consistency with the content-share activity and
making it a bit easier on the UI when rendering activities.
#502 - PR followup

- Adding tenant information to collections
- Grouping group-add-members by 'object'
- Minor code cleanup
Merge branch 'issue-502-activity-issues' of git://github.com/simong/Hilary into issue-502-activity-issues
Minor doc fixes
Fixed config file