Pylint-ignore

- Fix: bugs related to multiprocessing on MacOSX and Windows

- Fix: enable use of `--jobs=<n>` with `n > 1`

- Fix: compatability with python 2.7 and pylint 1.9.5

- Add overview section to `pylint-ignore.md` file.
- Fix: Handling of issues not related to a specific file or line (e.g. `duplicate-code` across multiple files)
- Fix: parsing of `--ignorefile` argument.
- Fix: parsing of `--jobs` argument.
- Allow ignore of `(E) error` messages again, prioritize entries, instead in ignorefile.

- Don't ignore messages of type `(E) error, for probable bugs in the code`

- Initial release