GPU QRB update

The Quick Return Bonus (QRB) gives more points when WUs are completed quickly.  This helps keep the points in line with the science.  Now with the GPU core maturing, our plan is to treat all WUs identically, i.e. benchmark on a single benchmark machine (SMP) and use those points. Now that we can do just about any calculation on any piece of hardware, it's strange to benchmark them separately. That wasn't the case before where the capabilities of the GPU and SMP cores were very different.

With the new GPU core (17), we'll have that matching capability. Our plan is to introduce QRB to GPUs with the rollout of production core 17 WUs.