ciutils not part of release

[xiaotie-chen]

import mpisppy.confidence_intervals.ciutils as ciutils

when pip install mpissppy, the above one doesn't work

when pull from github and do pip install -e., it works

[Salancelot]

The mpi-sppy/confidence_intervals module does not contain a __init__.py, so the find_packages() in setup.py does not include this folder.