cleaning up MANIFEST and other files so that sdist works
fixing docstring unittests
more changes to the docstring unittests
more dostring fixes.  all should pass now
final pass at fixing docstring unittests
updated MANIFEST to include all txt files.

made the DEV readme more verbose
this sphinxext is now covered in numpydoc:
https://github.com/numpy/numpydoc
and is updated there
added 3d FD rotated anisotropy
possible import problem
updated CR to a new, shorter method.

cleaned diffusion.py a little

simply clean on vis
Changed the Schwarz C-code.  Discovered why it was so slow.
I was previously setting an entire array to zero each time a
dof was relaxed, while in fact I only needed to reset a few values to
zero each time a dof was relaxed.  The routine is much, much faster now.