Async HTTP benchmarks on PyPy3

Since Mozilla announced funding, we've been working quite hard on delivering you a working Python 3.5. We are almost ready to release an alpha version of PyPy 3.5. Our goal is to release it shortly after the sprint. Many modules have already been ported and it can probably run many Python 3 programs already. We are happy to receive any feedback after the next release. To show that the heart (asyn