Without this change, [cibuildwheel](https://github.com/pypa/cibuildwheel) cannot build a correct wheel from the generated project. The problem is that the native lib is added by `MANIFEST.in` and `python3 -m pip wheel` ignores it and thinks that the package is pure Python. Thefore it builds a pure wheel and the packaging pipeline crashes.
This CL fixes an issue with the way python import statements are generated using an realtive current directory approach that is no longer compatible with python3. The default behavior has been updated to default to a dot-relative absolute package import for "go" and compiled extension, and a configuration option has been exposed from the CLI flags down to the bind package.
A refactor of configuration options was added to avoid further expanding the number of arguments being passed through the system.
Fixesgo-python/gopy#239
Vadim Markovtsev