Added PLCID variable accessible from C side, set with binarie's MD5. Added retain init and cleanup calls. Extended tests/python to test PLCID
int CheckRetainBuffer(void){ return 1;}void ValidateRetainBuffer(void){}void InValidateRetainBuffer(void){}void Retain(unsigned int offset, unsigned int count, void *p){}void Remind(unsigned int offset, unsigned int count, void *p){}