Add in a BlackScholes Benchmark.

After looking at hemi and seeing it use black scholes as a
both a benchmark and a 'complex' worklet I was inspired to see
if we can do the same in DAX.

So now we have a basic BlackScholes implementation in DAX!
Remove traces of the old timing code from the benchmarks
Merge branch 'remove_timing_traces'
Merge branch 'black_scholes'