A hard limit on the total number of atoms participating in tautomerization is now adjustable
in OETautomerOptions. Additionally, an adjustable parameter
maxZoneSize has been added for setting the maximum number of atoms that are allowed
in a continuous tautomerization zone. Any molecule that exceeds either of these limits will
cause OEEnumerateTautomers to return the input tautomer.
OETautomersLargestZoneSize function added to
return the largest number of atoms in a continuous tautomerization
zone for a particular molecule.