Bug 1095533 — Add an owner property for participants.
Bug 1094838 — Be consistent on the userMac usage.
Merge pull request #242 from mozilla-services/1095533-owner-property

Bug 1095533 — Add an owner property for participants.
Merge pull request #245 from mozilla-services/1094838-userMac-consistency

Bug 1094838 — Be consistent on the userMac usage.
Fix userMac rebase.
Fix participant id wording.