Implementing random seed on CRY generator

[jgalan]

Inside the CRY generator documentation is stated that we can modify the random sequence using our own random function:

CRYSetup::setRandomFunction(double (*newFunc)(void))

I did few tests but I did not succeed to use TRandom3. Anyone knows what would be the proper way to pass the function pointer to CRY?

@rest-for-physics/core_dev ?