[kanzure]

You can always put the wiki as a submodule in the git repo since the github wikis are just git repos too:

git clone [e-mail]:whatever/whatever.wiki.git

[straykov]

And what is the format of Wiki pages?

[anton_gogolev]

GitHub uses Gollum [1] for wikis.

[1]: https://github.com/gollum/gollum/wiki