added hypercubeSignature initialization from a pair (long[], size)
added hypercubeSignature initialization from a pair (long[], size)

AlexanderViand/HElib,shaih/HElib,berserkr/HElib,berserkr/HElib,AlexanderViand/HElib,berserkr/HElib,shaih/HElib,AlexanderViand/HElib,shaih/HElib