First version on pypi

Had to add a MANIFEST.in to make sure the louvain binaries got included. Works on google colab as demontrated in this notebook where it's used in conjunction with gkmexplain: https://github.com/kundajelab/gkmexplain/blob/6782c7b6dfc077962c59d60b60bc23ddbdf9f61a/lsgkmexplain_NFE2.ipynb