Make `test_utils` runnable.
Add basic return-type checking to odin.local.

Currently, only `DistArray` and `NoneType` return types are allowed.
Unskip NoneType test, skip np.float64 test.
Rename test for consistency.
PEP8.
Pull out a function.
Fix a comment.
Merge branch 'odin' into feature/DistArrayProxy-slice-views

Conflicts:
	distarray/tests/test_client.py
Set unittest verbosity in test_utils.

For consistency.
Add a run_tests script (until we fix test discovery).
Merge branch 'odin' into feature/big-merge

Conflicts:
	distarray/odin.py
	distarray/tests/test_client.py
	distarray/tests/test_utils.py