Added PyCharm's .idea folder to gitignore
Added tests package
Added basic unit test
Added test case to replicate [issue 3](https://github.com/CraigJPerry/setuptools-pep8/issues/3)

Currently failing.
Fixes [issue 3](https://github.com/CraigJPerry/setuptools-pep8/issues/3)

options dict's keys are being clobbered instead of extended, results in sensible defaults to exlude like ".svn" going missing as well as the reported issue.

Special cased the include / exclude directives to break parsed string into a list on , chars.
Refactor, minor code quality improvement
Added news in prep for release
Version bump in prep for release
Remove unused import
Merge bugfixes (with release number bump)