Latest version is faster and gives more "stable" hashrates

Tested on the following:
A. 1 x R9 380 -> A lot faster than before (close to 20%), "stable" hash rate
B. 3 x R9 380X -> About 5% faster, "stable" hash rate
C. 5 x RX470 + 1 x RX480 -> Not faster but "stable" hash rate

By stable, I mean there are very small fluctuations