New, simpler configuration for job-submission (via pypeflow)

• https://github.com/PacificBiosciences/FALCON/wiki/Configuration
  • The legacy configuration should still work, but you will see warnings.
• Also, a change to job-submission options should be reflected in each task upon restart.
  • We still need to make other options dynamic like that (the tricky part involves options that affect the number of parallel jobs), but at least you can change how jobs are submitted when you resume a workflow.