Problem
I can't find any reference or links to the ASV benchmarker in the documentation

Solution
I think a small section with a link to the ASV benchmarker and some discussion about why we benchmark pvlib, how to use read the results, and whatever

Alternatives
There are links in the pull request #1049

Additional context
The benchmarks are really cool, and it's impressive that we have them, so we should advertise and help people use them and solicit their feedback on how we can improve, what's useful, what's not, etc.