std.benchmark ready for review. Manager sought after

[Francois Chabot]

> Which is great, unless the program wants to measure the cache 
> memory itself, in which case it would use special assembler 
> instructions or large memset()s. (We do such at Facebook.)

I disagree. If a regression suddenly causes a function to become
heavily cache-bound, it should show up in benchmarks somehow,
regardless of the previous expected behavior of the function.

--
Francois