Need to delete old exports

[taylortom]

At the moment, these are all stored indefinitely.

Simple solution is to only keep one export per course. Any other ideas?

[taylortom]

Better solution could be to store one per-user/per-course, then delete on logout

[taylortom]

Have altered exports to only allow a single zip per-user (with the zip name now being the user's ID).
Couldn't see a way to tap into a logout event from the backend, so haven't implemented that. Is this a suitable solution? @brian-learningpool @dancgray