upgrade gem
Add extra models to test.
Promisify some paper relationships.

[ci skip]
allow different regions for S3 buckets
add AWS_REGION env var. trim whitespace
(sip) event stream for dashboard papers based on collaborators
Remove papers from dashboard when removed as collaborator
clean up
improve method signatures
Merge branch 'master' into ember-data-beta-10
Change determineRelationshipType signature.
condense multiple promise-property things.
Remove uneeded test.
[ci skip]
README code formatting
update Task generator to create an engine
fix generator-mountable and skip-unit-test flags
add rake task to create custom Task card in Tahi

run with: rake custom_cards:install[‘Visualize’]
Fix computed property that depends on a promise.
Remove task/phase relationship code.
Set initial message comment differently.