Workaround for Kerberos bug in slurm sbatch --parsable (solves #148)

[Hoeze]

In addition, added a missing configuration option to README.md which took me two hours to debug

[rkdarst]

I'd say this looks good. Really this splitlines thing could be applied many more places, since if it's one line it doesn't matter, if there is random messages they will usually be at the start. But that's something for another time.

For the API handler thing, I'd recommend leaving it as in #126. It's conceivable that the handler names and what needs to be written could change in the future (especially since this is still new and developing), and just importing it will always work in the future. In fact I'd recommend just importing batchspawner, not batchspawner.api, for a similar reason...

[Hoeze]

Thanks for the review @rkdarst. I changed the readme accordingly.

[rkdarst]

Thanks, I merged this into my "dev" branch so it will get taken when #144 goes in. Looks like the import batchspawner was also in #130, so I removed one duplicate.