Merge branch 'develop' of github.com:CenterForOpenScience/osf into develop
Merge branch 'develop' of github.com:CenterForOpenScience/osf into develop
Merge branch 'develop' of github.com:CenterForOpenScience/osf into develop
Merge branch 'develop' of github.com:CenterForOpenScience/osf into develop
Merge branch 'develop' of github.com:CenterForOpenScience/osf into develop
Merge branch 'hotfix/0.20.15'
Move Piwik provisioning into a Celery task.
Add Piwik tasks to source control.
Move storage setup into separate Celery import.
Defer Celery tasks until request teardown.
Show statistics on private nodes.
Revert preprocess request in base test cases.
Merge branch 'develop' of github.com:CenterForOpenScience/osf into develop
Start the first function
Move Celery setup and teardown into signals.
Allow uploads from project dashboard page

fix https://github.com/CenterForOpenScience/osf/pull/1169
Don't allow uploads in disk-saving mode
Fix language in Dropbox deauthorization modal

fix https://trello.com/c/1ciySprk
[skip ci]
Handle hgrid exception raised when dropbox token is invalid

An unhandled error occurs if a user tries to drag and
drop a file into a linked dropbox folder when their
credentials are invalid.

Re-raise the dropbox.rest.ErrorResponse [401] as
an HTTPError. If the error is not 401, raise as
400.
Test upload dropbox file with invalid token throws error

Also change error message language to include a
more general "check your project settings"
to apply to both the dropbox account owner
and any contributors.