Bugfix: cpu: Adapt benchmarking code to new benchmark work generator
Remove old bench_block.h, no longer needed
cpu: Fix and simplify benchmarking on Windows (removes hidden --bench-algo option)
Merge branch '2014-benchmark' into bfgminer

Conflicts:
	bench_block.h
Simplify _now_gettimeofday on Windows, working around weird WINE crash
Merge commit '1cbe618' into bfgminer