gituser/pypi: links for nbgrader-merge

gituser/pypi nbgrader_merge-0.1.1.tar.gz
gituser/pypi nbgrader_merge-0.1.1-py3-none-any.whl
gituser/pypi nbgrader_merge-0.1.0.tar.gz
gituser/pypi nbgrader_merge-0.1.0-py3-none-any.whl