Add OOMMF_PATH file so the oommfmif tools can find it.
Add OOMMF_PATH file so the oommfmif tools can find it.

fangohr/oommf-python,ryanpepper/oommf-python,ryanpepper/oommf-python,fangohr/oommf-python,ryanpepper/oommf-python,ryanpepper/oommf-python,fangohr/oommf-python