Add `DistArray.view` for dtype=None case.
Also test dtype==self.dtype.
Be explicit about the dtype.
Add a failing test for view with different dtype.
Add a Returns section to the docstring.
Add general `view` method, with tests.
Remove some debugging print statements.
Remove an unused import.
Remove an old broken local view test.

It doesn't generally make sense to call view locally.
Merge pull request #492 from enthought/feature/view

Add a general `view` method for DistArrays