Diff-cover

* Added option to consume pylint/pep8 reports instead of
calling the tool directly.

* Handle symbolic names in pylint output.

* Fixed bug in parsing unicode filenames from git diff output

* Coverage report now includes snippets from the original source file

* Fixed a bug that would cause multiple coverage reports to
always show 100% coverage.

* Fixed bug when running diff cover during a merge conflict (Issue 41)

* Added --no-ext to git diff command
* Added Python 2.6 support

* Fix a bug in which function names and TODO: were not appearing in
`diff-quality` reports.

* Add support for code quality metrics (pep8 and pylint for now).
Invoked via call to `diff-quality`

* Add support for multiple coverage XML inputs.

* Refactored diff report generator to use Jinja2 templates