Jonathan Hallström

Results 4 issues of Jonathan Hallström

![Screenshot 2023-11-29 105002](https://github.com/davidMcneil/mnist/assets/84847878/87cf5e6f-99e0-496b-9429-f9fd18e7b533)

I noticed that std.mem.reverse wasn't getting optimized to use SIMD while optimizing a program a while ago, and decided to make my own faster implementation. After refining it a bit...

Should close https://github.com/ziglang/zig/issues/21655 Unable to verify myself due to issues with building zig locally

Modernized the entire codebase including `build.zig` and `Makefile`, engine is now a little faster due the more modern compiler.