Hack to get graphtest.py to work with cythonized graph class that demands chem.Atom and chem.Vertex types.
Hack to get graphtest.py to work with cythonized graph class that demands chem.Atom and chem.Vertex types.

git-svn-id: 38f1702c2d2bc28f7341d40983eddaad0d99b903@185 37378900-1858-4726-a06b-e54562fdc990

pierrelb/RMG-Py,enochd/RMG-Py,chatelak/RMG-Py,chatelak/RMG-Py,pierrelb/RMG-Py,nyee/RMG-Py,KEHANG/RMG-Py,nyee/RMG-Py,comocheng/RMG-Py,faribas/RMG-Py,comocheng/RMG-Py,faribas/RMG-Py,nickvandewiele/RMG-Py,KEHANG/RMG-Py,nickvandewiele/RMG-Py,enochd/RMG-Py