Added --salt & --password parameters for generate_auth_file --auth-scrypt
Bypass interactive salt &password ask procedure ./silkaj generate_auth_file --auth-scrypt --salt=mySALT --password=myPASSWORD
Bypass interactive salt &password ask procedure ./silkaj generate_auth_file --auth-scrypt --salt=mySALT --password=myPASSWORD