• major performance improvements for BeamHashIII (up to +2-3% dependent on GPU)
• added AMD solvers for Ethash and Etchash
• significantly reduced stale shares percentage on Ethash algorithm, it will improve hashrate on pool side
• support Etchash algorithm (Ethereum classic algorithm after hardfork), use --algo etchash, miner auto switch to HF algorithm on epoch 390.
  Also you can use --algo etchash_test for testing Etchash on test network (HF epoch is 82)
• reduced memory usage for Cortex 8GB solver (about 50MB)