Setuptools-rust

- Fixed bdist\_egg and bdist\_wheel support
- setuptool's clean command cleans rust project as well
- Use absolute path to cargo manifest
- Enable debug builds for inplace builds, otherwise build release
- Simplify monkey patches

- Fix compatibility with some old versions of setuptools

- Fixed OSX extension compilation
- Use distutils exceptions for errors
- Add rust version check for extension
- Cleanup example project

- Fix bdist\_egg and bdist\_wheel commands

- Initial release