Adding gtkparasite to gtk?

[Richard Hughes <hughsient gmail com>]

I think gtkparasite is a really useful tool for GTK developers. It's
currently hosted in github, and the upstream seems unwilling to port
to GTK3, and consequently there are over a dozen forks of the project
in various states of maintenance.

I'm going to suggest merging in gtkparasite to modules/ in gtk. This
means it's kept up to date with the latest GTK codebase, and we can
start to recommend its use to developers and hackers. So, any
objections?

Richard.