• added automatic detection of best -dcri values in ASM ETH-only mode if -dcri option is missed.
  Press "s" key to see current values, you can also press "z" key to restart detection.
• improved support for systems with many GPUs (eight and more) and slow CPU: much less CPU load, EthMan works fine now.
• added assembler kernel for RX550 card. This card is not good for dual mining, but in ETH-only mode ASM kernel is faster by about 7%.
• added "x" key to select GPU for manual -dcri value adjustment.
• several minor bug fixes and improvements.