An introductory book to Mallard

Hi all, some of the GNOME docs team are at the GSoC doc camp for the
next few days and we will be writing a short introduction to Mallard
book which will cover the Mallard basics and integration into GTK+
applications.

If you want to have a look at the WIP as we write it, you can find it
at http://booki.flossmanuals.net/introduction-to-mallard/