Upload actual bindings to PyPI, not just a placeholder

[ncoghlan]

https://pypi.org/project/solv/0.0.1/ is just a placeholder to reserve the name on PyPI, it doesn't actually including usable bindings for libsolv.

This should be fixed so that the package on PyPI:

• uses a version number that matches the underlying libsolv version
• includes the full libsolv source code in the sdist
• includes a statically linked manylinux1 extension module for convenient pip install compatibility

[ncoghlan]

Note that static linking may currently be buggy though: https://github.com/openSUSE/libsolv/issues/210

[ncoghlan]

Options to investigate for this purpose:

• scikit-build: https://scikit-build.readthedocs.io/
• cmake-pip: https://bitbucket.org/renficiaud/cmake-pip

(Latter via @asmodehn in https://github.com/pypa/python-packaging-user-guide/issues/284#issuecomment-331699835)