`a_path` and `b_path` properties parsed out correctly. Previously, some

values may have been populated incorrectly when a file was added or

deleted.

* Fix: diff parsing issues with paths that contain "unsafe" chars, like

spaces, tabs, backslashes, etc.

* IMPORTANT: This release drops support for python 2.6, which is

officially deprecated by the python maintainers.

* CRITICAL: `Diff` objects created with patch output will now not carry