include examples of sites built with perun on perun.io

Hi there, just came across Perun and am psyched to check it out further. One of the first things I looked for on perun.io was a list of example sites whose source I could read. I eventually found this at https://github.com/hashobject/perun#examples, but I suggest putting this on perun.io.

This might also be a good source: https://github.com/search?q=topic%3Aperun&type=Repositories