Wrap old class call with deprecation message.
Wrap old class call with deprecation message.

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