Use Unused Runs at Midnight

[bhuvy2]

A lot of students are accustomed to nightly runs, and just forget to use their daily autograders. We should run a student at 11:59:59 (or schedule it at 12:00:01 on the following day to check the previous day to avoid race conditions)
if they haven't run their runs for the current day yet

[Ram-G]

This is a duplicate of #19

[bhuvy2]

Wow, should read the issues, closing in favor of that.