Make FW errors transparent

[ktran9891]

When rockets fizzle, their error logs are buried. It'd be nice to have a way to pull and parse them for debugging purposes.

[ktran9891]

Tangentially: Luigi has a task status tracking feature (see the Task.set_tracking_url syntax)

[ktran9891]

P.S. I think @apalizha is working on this right now, and she might have some test functions already built.

[apalizha]

Created a pull request (on 12/5/2018).

[ktran9891]

Assisted by 6554c73 and eb2d408. Documentation thereof added by 7edfba2.

This should be good enough for advanced users. Will wait to close until RISM branch is merged into master.