Add links to showcased styles in README

[sbseltzer]

Several of the styles showcased in the README don't link to corresponding examples. The game-like ones in particular would be very educational to see how they were made. Can we add those?

[dumblob]

Feel free to make a pull request 😉 (see also our issues tracker - at least #202 , #349 , #749 ).

[sbseltzer]

I'd make a PR if I knew where those examples came from. The problem is I'm interested in specifically the ones shown in the README. Those other issues don't seem to refer to them at all. Where did the showcased ones come from?

[dumblob]

@vurtun gathered most of them. @vurtun would you have any hints?

[leranger]

Hi,
The game-like one was made when nuklear was called zahnrad.
https://gist.github.com/durango/e347a0ebf7e0ad0f8e0a5bfaa73f0884/