Too many wikis

I've noticed there are 3 wikis for this project:

1. Trac wiki which seems to be almost empty.
2. Wiki on website. This one has one pull request open. Otherwise seems outdated.
3. Github's wiki. This one seems most best of all but also not entirely complete.

A good thing would be merging dangling pull request, and then merging website wiki into Github. Trac is not updated, so it is useless now and should be closed.