FingerprintMol(mol)
generates the EState fingerprints for the molecule
Concept from the paper: Hall and Kier JCICS _35_ 1039-1045 (1995)
two numeric arrays are returned:
The first (of ints) contains the number of times each possible atom type is hit
The second (of floats) contains the sum of the EState indices for atoms of
each type.