Finance would like to have info about the date any given refund is requested.

This commit adds a refund_requested_time field to OrderItem and a refund_time to Order.

When a user *requests* a refund, the refund_requested_time field on OrderItem is updated; when a user actually *receives* their refund, the refund_time on Order is updated.

Note that only the refund_requested_teim field is actually used right now; later on, when we're able to actually automate the process of actually giving users refunds, we will start usings Order's refund_time field.

Static URL double-slash

Let staticfiles determine the footer URLs

Change forum role granted to staff on enrollment

This applies to global staff (is_staff=True), not course staff.
Previously, staff were granted the Moderator role but not the Student
role upon enrolling in a course. If the Moderator role were later
revoked, then the user would have no role and be unable to post in the
forums, which is confusing for the user. edX staff indicated they would
prefer to not automatically receive the Moderator role, so the Student
role is granted instead. Note that staff will still be able to grant
themselves Moderator privileges through the instructor dashboard if
they wish.

JIRA: FOR-338

fix typo in ORA template (ORA-136)

Encode header row (LMS-197)

Added developer-specific settings to devstack

Fix LTI max_score method.

Video Transcripts: Fix clear and download buttons.

Update logging.getLogger() calls to use edx instead of mitx

Removed unused rake tasks

MITX_ROOT_URL => EDX_ROOT_URL

Studio: FIX - reinstating Terms of Service and Privacy Policy references

Documentation/new studio doc/12 04 13

Make runone work with more test output.

mitx_markdown => edx_markdown

Studio: adding back in links (and supporting styling) to ToS and Privacy Policy to footer and sign up UI
STUD-151

Disable Peer Track Changes

Worked through Andy's list

Continued Editorial work

update to checking student progress, create new course, index, open
response assessment

New documentation from rewrite, audit, and integration of some
documentation from edx101.  Intent to release by training on 12/5.

settings.MITX_FEATURES => settings.FEATURES

Change video transcripts to use locators instead of locations.

STUD-1008

For a smoother transition to the new world

mitxmako => edxmako