Build gnome-shell as a binary linked against libmutter-wm, instead of
a module to be loaded by libmutter-wm. Move the majority of
initialization-type stuff from gnome_shell_plugin_start() into main().
We still build libgnome-shell as a shared library, so that the linker
doesn't discard all the methods that are never called from C.
https://bugzilla.gnome.org/show_bug.cgi?id=641724
The current gnome-shell.in script has a huge amount of
unnecessary complexity for the installed, normal case. Fix
this by adding a configure option (defaulting to false) that
installs a simple, obvious wrapper script around mutter.
We do change the gnome-shell build setup to pass this option
by default for jhbuild.
https://bugzilla.gnome.org/show_bug.cgi?id=642084
