partition and time limit flags

[tkphd]

In order to "be kind to the scheduler," it's good practice to specify, at absolute minimum, which partition a job will run on, and the upper bound on how much time it should take.

• [ ] Add partition and time limit flags to the "example job", and propagate throughout.

[psteinb]

Thanks for moving this over. I'll mark this with help wanted so that potential newcomers know where to potentially start.