September Newsletter

Reopening so I can merge with GitHub as soon as I finish it.

It's perhaps also nice to mention that this was another small step into bringing Neovim to Windows. The earlier `QueryPerformanceCounter()` code was removed in the big unifdeffening, and Windows doesn't support `gettimeofday()`, so this needed to happen either way. A nice bonus is the more accurate timer code and no more `#ifdef` soup. (that was also the main impetus of my work, to make @equalsraf's work easier)