bug fix: ROTATE should not stop spin if it does not initiate a spin
bug fix: CIPChirality tests for CIP1966#31,#32 douple spirans and C3 compounds
bug fix: CIPChirality for Rule 2 using atomic masses and not for duplicate atoms
bug fix: MOL file reading where isotope is indicated in atom line and V item
bug fix: MOL reader fails for H1, D, T isotopes indicated as symbols along with isotope difference