Slurm-pipeline

Added `env PYTHONPATH=../..` to all example Makefiles.

* Added `--scriptArgs` to `slurm-pipeline.py` to formalize giving arguments
on the command line that should be passed to initial step scripts (i.e.,
those that have no dependencies). This prevents the possibility of
putting unrecognized arguments (like `--startStep`) on the command line
which are then passed to the script steps.

Added Travis CI build messaging to IRC.

Updated funding acknowledgements in `README.md`.

Added "error step" setting to per-step information printed by
`slurm-pipeline-status.py`.

Added JobName to list of default job status fields printed by
`slurm-pipeline-status.py`.