differentiate them in the drop down (just added MD to names for
now--brian's doing the official differentiation)

add service entry point to generate tar.gz file and return to caller. Use of the NamedTemporaryFile will auto cleanup.

along.

fix command error message. There are really only two arguments supported (the optional 6 had been removed, but I forgot to change the message

fix up some thumbnail issues. Also we need to manage the user permissions when we clone and delete course

plus commented out failing unit tests until I can get someone to help
debug them.

a partial descriptor. 
Use 400 not the contrived 515 for malformed html.

show an alert.

Addressed some of Christina's review comments.

initialize the tabs metadata on course if we go to the edit-tabs page. This will prevent the author from getting into a bad state in the LMS

speeds and don't use the video/default.yaml format.

other course info bugs (not editing/deleting right element if > 10,
putting new elements at end rather than beginning of list).
Made Location more robust against parsing errors.