Mutter patches needed for gnome-shell

[Owen Taylor <otaylor redhat com>]

I've gone through, extracted all the non-upstream specifics in the
gnome-shell branch of Mutter, rebased them against the tip of the mutter
repository, and filed them against the new 'mutter' component in
bugzilla.gnome.org.

I think all these patches are ready to be landed: they have generally
been reviewed by multiple gnome-shell team members. But I'd appreciate
review by the Mutter maintainers.

If we get these in, we can then proceed to renaming the installed binary
and files to 'mutter' and have working parallel install with metacity
(and packageability!)

(If you are interested in mutter, you should add an email watch on
mutter-maint gnome bugs to your bugzilla.gnome.org preferences.

Uncontroversial enhancements
============================
We have a few patches that are pretty much completely uncontroversial,
but aren't yet in upstream Mutter for one reason or another.

Improve handling of errors when calling CompositeNameWindowPixmap
http://bugzilla.gnome.org/show_bug.cgi?id=580023
Add ::window-added and ::window-removed signals to MetaWorkspace
http://bugzilla.gnome.org/show_bug.cgi?id=580025
Fix return transfer annotations for a number of functions and add docs
http://bugzilla.gnome.org/show_bug.cgi?id=580027
In case of GConf failure, fall back to local keybinding values
http://bugzilla.gnome.org/show_bug.cgi?id=580031
Allow setting input region before output window is created
http://bugzilla.gnome.org/show_bug.cgi?id=580042


Introspection support
=====================
These three patches together allow building introspection information
for Metacity itself and for Mutter plugins. If gobject-introspection is
not present or --without-introspection is passed to configure, Mutter
will be built without introspection.

Load plugins separately from initializing
http://bugzilla.gnome.org/show_bug.cgi?id=580032
Don't use G_MODULE_BIND_LOCAL
http://bugzilla.gnome.org/show_bug.cgi?id=580033
Build and install introspection information
http://bugzilla.gnome.org/show_bug.cgi?id=580041


Somewhat gnome-shell specific
=============================
A couple of bugs add support for features that aren't all that general,
but were needed for gnome-shell. They shouldn't affect non-gnome-shell
uses of Mutter.

Add meta_workspace_set_builtin_struts()
http://bugzilla.gnome.org/show_bug.cgi?id=580026
Add support for a "meta key" which initiates extended WM operations
http://bugzilla.gnome.org/show_bug.cgi?id=580030