Code Workout Exercises Don't Display

[cashaffer]

For any Code Workout exercise, the exericise display iframe gives "bad gateway".

[awhicks]

This is because we're still using codeworkoutdev, once our PR gets merged in we can switch. I don't have a clean local setup to restart development so we also need to wait on Dr. Edwards to restart that machine.

[cashaffer]

Does having the version set up on acos.cs.vt.edu help you with development?