Includes six.py module in distarray.

Fixes all imports.  Includes six's license in docs.
Added a test for create_comm_with_list.
Added tests for invalid comm creation.
Added test for mpi_type_for_ndarray.
Added standard file metadata to new files.
Added -v option to unittest.
Merge branch 'master' into test-mpiutils
Add a `restart()` command to ipcluster.py.
Add a Makefile target for restart.
Added comments re not using standard test case, and trimmed overly broad test.
Merge branch 'master' into revert-bad-revert
Merge pull request #209 from enthought/revert-bad-revert

Added -v option to unittest.
Julia Set Demo: README, image, and numpy demo.
Julia set demo in IPython.parallel.
Change get_localarrays, add get_ndarrays.

get_localarrays now returns LocalArray objects.
Add tests for get_localarrays and get_ndarrays.
shape -> global_shape in base.py
Merge branch 'master' into test-mpiutils
Merge branch 'master' into feature/include-six

Conflicts:
	.travis.yml
	distarray/client.py
	distarray/local/denselocalarray.py
	distarray/odin.py
	distarray/tests/test_client.py
	examples/odin_demo.py
Removed overly literal copypasta.