Julia on HPC Clusters

[carstenbauer]

I've written https://juliahpc.github.io/. Depending on how important you think this "HPC workflow" aspect is, we should probably either integrate some of the content into MJW or at least link to this website somewhere. Opinions?

[gdalle]

Thanks for the suggestion! I think I'd rather link to it, because it's pretty far over beginner level (in fact it's even over my level cause I've never used HPC). Feel free to open a PR!