v3.0.1

• Add transfer function module (please read this paper )
• Add two new datatypes: TransferBinaryVar and TransferBoolVar.
• Fix bug un-order variables in PermutationVar data type.
• Update data type of encoded solution in BoolVar data type.
• Update correct function in BoolVar and BinaryVar.
• Fix bug reproduce results in GA, WCA, and EHO optimizers.
• Fix bug higher probability of 0 value in IntegerVar data type.