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)