adding layers.py
adding layers.py

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