[#81130804] pull select2 into project
[#81130804] change participants to select2
Merge branch 'master' into select2
[#81130804] call addParticipant on selected
[#81130804] persist and display selected participants
[#81130804] ability to remove participants
[#81130804] fix bug where you cannot remove just added participant
[#81130804] fix string vs num ember find
[#81130804] fix qunit tests
[#81130804] Fix broken select2 specs, event stream now works with select2
[#81130804] event stream create and destroy working perfectly!!!!!!!
[#81130804] user filtering is much cleaner

- no more ugly promises for local data on select2
- use paper id instead of task id for user roles
- clean up component more
- remove user search for now
Shared examples for collaborations
Participations policy spec
Temp. try on journal
Comments policy
MMT policy spec.
Phase templates policy spec
Task templates policy.

[ci skip]
Journal roles policy.