Allow setting log level in run()

[ethanbb]

This adds a --log-level option for the 3 algorithms and allows setting it from the run series extension method (as either a string or logging.X int), which gets passed to the subprocesses, slurm runners, etc. I think I did this because the default log level is WARNING, and I wanted to see the INFO level output.

Could be extended by allowing more fine-grained logging control at some point.