Added vs_utils to README
Added vs_utils to README

ktaneishi/deepchem,miaecle/deepchem,ktaneishi/deepchem,joegomes/deepchem,miaecle/deepchem,rbharath/deepchem,peastman/deepchem,miaecle/deepchem,ktaneishi/deepchem,deepchem/deepchem,Agent007/deepchem,lilleswing/deepchem,deepchem/deepchem,lilleswing/deepchem,rbharath/deepchem,Agent007/deepchem,Agent007/deepchem,peastman/deepchem,lilleswing/deepchem,joegomes/deepchem