gituser/pypi: links for langtools-core

gituser/pypi langtools_core-0.1.0b2.tar.gz
gituser/pypi langtools_core-0.1.0b2-py3-none-any.whl
gituser/pypi langtools_core-0.1.0b1.tar.gz
gituser/pypi langtools_core-0.1.0b1-py3-none-any.whl