Merge branch 'hotfix/0.20.15'
Sort files on initial load.
Catch unhelpful error message on onboarder upload failure.
Handle identical consecutive versions in migration.
Open source open science.
Merge pull request #1264 from JeffSpies/hotfix/open

Open source open science.
Update Travis badges
Merge branch 'hotfix/0.20.16'
Merge branch 'hotfix/0.20.16' into develop
Update README links
Merge branch 'master' into develop
Disable onboarder widgets when disk-saving mode is enabled
Merge branch 'hotfix/0.20.17'
Merge branch 'hotfix/0.20.17' into develop
Fix js in disk saving mode
Merge branch 'master' into develop
Update changelog
Merge branch 'feature/osf-storage' into develop
Merge branch 'develop' into release/0.21.0
Merge branch 'release/0.21.0'