Initial PR for verified cert reporting

Refactored from code in Stanford's itemized revenue reports into a new Report class used for all revenue-related reporting.

Models for all cert types complete; test coverage for half of cert types complete.

If this architecture is deemed solid, the next steps are to add a reasonable UI folks will use to select reports to download, allow them to restrict based on dates/universities, and of course complete test coverage.
Fixed CertificateStatusReportModel
Fixed UniversityRevenueShare model
Refactored tests
Migrations
Initial view
Response to CR
Template changes
Response to CR
More response to CR
Add a command to transfer students from one course to another.

Move only active students and also update cert item for verified students.
CertificateItems should be updated for all course students.

Not just students that are currently active.  Students may have enrolled with verified certs, paid, gotten
a refund, and un-enrolled from the original course.  This function should now capture that.
Save state before unenrolling student from old course.
Add an apostrophe to the Lorem text.
Fix single-quoted translated strings to be double-quoted.
small bugfixes for theming+sass+templates
BLD-518: Fix video volume cookie.
Fix bug about draft verticals reordering.

STUD-714
Merge pull request #2135 from edx/anton/fix-video-volume-cookie

Video: Fix volume cookie.
Merge pull request #2105 from edx/christina/reorder-privates

Fix bug about draft verticals reordering.