Merge into website

[chrysn]

A more website-ish version of this (that currently contains content from the meetup pages) is brewing at https://github.com/RustVienna/website; content here should be merged into there, ideally in a single swash.

[chrysn]

Even if we don't merge it into a website now, we should move it to a shared repository where more than one person can edit. Is @vienna-rust-meetup still reachable to move it? None of the meetup organizers I'm aware of has any rights in this repository.

[chrysn]

The repository has been moved in with RustVienna; the (main and original) part of this issue stays open, but will depend on whether we make a website at any point at all.

(I think we should, as the meetup page is terrible user experience unless you log in to their system, but I don't have the time to do it.)