v1.3.0

Update

Submitted as a patch to python.

Changed

• Used mock wrapping for file operations (seek, read, etc.) instead of side_effect. Now there's no need to use contrived workarounds to add a side_effect to a mock. Also, setting return_value actually works!
• Python 3: Opening files as binary creates (or changes to) a BytesIO to store contents.
• Merged the issues' unit tests to the main testing module.

Fixed

• Issue #3: Reset file's position after open.
• Issue #4: Consecutive with open logging as children of call() in mock_open.mock_calls (instead of just call).
• Replaced "" strings to the more python-esque ''.