Gtk+ html backend (broadway branch)

[Alexander Larsson <alexl redhat com>]

I just landed the "broadway" branch[1]. It contains a slightly more
cleaned up and functional version of the html gtk+ backend from my blog
post[2].

To try it, just build with --with-gdktarget=broadway and then start e.g.
demos/gtk-demo/gtk3-demo from the build dir. Then load
http://127.0.0.1:8080 from firefox 4.

Right now this only works with firefox 4, and there are several things
that are missing. For instance, grabs are just ignored, so menus don't
work, and the keyboard events are extremely simple.

However, it does work, and at this point it might be interesting to
other people.

[1] Broadway 2.0 is a reference on the old X11 browser plugin
[2] http://blogs.gnome.org/alexl/2010/11/23/gtk3-vs-html5/
-- 
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 Alexander Larsson                                            Red Hat, Inc 
       alexl redhat com            alexander larsson gmail com 
He's an ungodly one-eyed romance novelist who hangs with the wrong crowd. 
She's a warm-hearted out-of-work former first lady from beyond the grave. They 
fight crime!