Add Makefile for easy removal of mif and pyc files.
Add Makefile for easy removal of mif and pyc files.

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