Add DEFAULT_FILE_STORAGE configuration.

It might be different from the requested filename.

Tests in common are run with both CMS and LMS configuration (with different env files). Ensure the DEFAULT_FILE_STORAGE variables are in both environments.

Fix Mako templates to always use updated request context

add find_fixme task

Upload CSV file for cohorting students

TNL-735

Fixed the edX middleware to lazily create request
context for Mako templates, so that it is based on
any changes made to the request object.

Verified that with this fix the "Instructor" tab is
correctly hidden when a staff member is viewing
the course as a student.

Clean up common/ images - moving, deleting, renaming as necessary

OPEN-328

OPEN-328

spinner.gif and spinner-on-grey.gif are the same file.
Explicitly give the LMS a spinner.gif file.

OPEN-328

OPEN-328

OPEN-328

Corrected Import Statement

MA-157 Move context back into properties.

Move app-generated context back into properties.
Ignore BI events through segment's webhook.
Ignore events without Data in Properties.

Release 2014-12-10

Fix assert.

Assert mistakenly had comma instead of double-equal - now correct.

Legacy dash cleanup

Adam/add defunct states for cart