Add implementation from Cameron Aavik

[CameronAavik]

As per your recommendation on twitter, opening an issue here to see if you can add my solution to your .NET results comparison table: https://github.com/CameronAavik/1brc

I'm using Windows but according to the total process time my solution seems to be ~0.87s faster 2.22s -> 1.35s, and according to Stopwatch inside the program it is ~0.11s faster 1.45s -> 1.34s.