optimized opencl kernel
Revert "optimized opencl kernel"

This reverts commit e5bc0b9e087fd95652ad682f327734af3701a907.
Revert "Revert "optimized opencl kernel""

This reverts commit 5a24fd176cb7c3030021b630337edaf4a6d13c2d.
Merge branch 'master' of https://github.com/Bufius/vertminer-gpu
reverted opencl optimization