Modified the PaDEL descriptor generation to accept options such that the user can turn on/off 2D or any of the individual fingerprint type descriptors

# options for types "2D", "Fingerprinter", "ExtendedFingerprinter",
"EStateFingerprinter", "GraphOnlyFingerprinter",
# "MACCSFingerprinter", "PubchemFingerprinter",
"SubstructureFingerprinter", "SubstructureFingerprintCount",
# "KlekotaRothFingerprinter", "KlekotaRothFingerprintCount"