Comprehensively rename to Mutter

Code:
All references in the code not related to themes, keybindings, or
GConf were changed from 'metacity' to 'mutter'. This includes, among other
things, strings, comments, the atoms used in the message protocol, and
the envvars used for debugging. The GConf schema file was reduced to
the 3 settings new to mutter.

The overall version was brought up to 2.27 to match current gnome.

Structure:
All files named '*metacity*' were renamed '*mutter*' with appropriate
changes in the automake system.  Files removed are
doc/creating_themes, src/themes, doc/metacity-theme.dtd,
metacity.doap.  These files will eventually end up in an external
gnome-wm-data module.

Installation location:
On the filesystem the mutter-plugindir was change from
$(libdir)/metacity/plugins/clutter to just $(libdir)/mutter/plugins.
The mutter-plugins.pc.in reflects these changes.

Note:
mutter.desktop.in and mutter-wm.desktop both continue to have
X-GNOME-WMSettingsModule=metacity set.  This allows
gnome-control-center to continue using libmetacity.so for
configuration.  This is fine since most the general keybindings and wm
settings are being read from /apps/metacity/* in gconf.

src/ui/draw-workspace.c

@@ -3,7 +3,7 @@
 /* Draw a workspace */
 
 /* This file should not be modified to depend on other files in
- * libwnck or metacity, since it's used in both of them
+ * libwnck or mutter, since it's used in both of them
  */
 
 /* 

src/ui/fixedtip.c

@@ -1,6 +1,6 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
-/* Metacity fixed tooltip routine */
+/* Mutter fixed tooltip routine */
 
 /* 
  * Copyright (C) 2001 Havoc Pennington

src/ui/fixedtip.h

@@ -20,7 +20,7 @@
  */
 
 /**
- * \file fixedtip.h  Metacity fixed tooltip routine
+ * \file fixedtip.h  Mutter fixed tooltip routine
  * 
  * Sometimes we want to display a small floating rectangle with helpful
  * text near the pointer.  For example, if the user holds the mouse over

src/ui/gradient.h

@@ -1,6 +1,6 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
-/* Metacity gradient rendering */
+/* Mutter gradient rendering */
 
 /* 
  * Copyright (C) 2001 Havoc Pennington, 99% copied from wrlib in

src/ui/menu.c

@@ -1,6 +1,6 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
-/* Metacity window menu */
+/* Mutter window menu */
 
 /* 
  * Copyright (C) 2001 Havoc Pennington

src/ui/menu.h

@@ -1,6 +1,6 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
-/* Metacity window menu */
+/* Mutter window menu */
 
 /* 
  * Copyright (C) 2001 Havoc Pennington

src/ui/tabpopup.c

@@ -1,6 +1,6 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
-/* Metacity popup window thing showing windows you can tab to */
+/* Mutter popup window thing showing windows you can tab to */
 
 /* 
  * Copyright (C) 2001 Havoc Pennington

src/ui/testgradient.c

@@ -1,6 +1,6 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
-/* Metacity gradient test program */
+/* Mutter gradient test program */
 
 /* 
  * Copyright (C) 2002 Havoc Pennington

src/ui/theme-parser.c

@@ -3990,10 +3990,10 @@ meta_theme_load (const char *theme_name,
             }
         }
 
-      /* Look for themes in METACITY_DATADIR */
+      /* Look for themes in MUTTER_DATADIR */
       if (text == NULL)
         {
-          theme_dir = g_build_filename (METACITY_DATADIR,
+          theme_dir = g_build_filename (MUTTER_DATADIR,
                                         "themes",
                                         theme_name,
                                         THEME_SUBDIR,

src/ui/theme-viewer.c

@@ -770,7 +770,7 @@ main (int argc, char **argv)
   GtkWidget *notebook;
   int i;
   
-  bindtextdomain (GETTEXT_PACKAGE, METACITY_LOCALEDIR);
+  bindtextdomain (GETTEXT_PACKAGE, MUTTER_LOCALEDIR);
   textdomain(GETTEXT_PACKAGE);
   bind_textdomain_codeset(GETTEXT_PACKAGE, "UTF-8");
 
@@ -781,7 +781,7 @@ main (int argc, char **argv)
 
   gtk_init (&argc, &argv);
 
-  if (g_getenv ("METACITY_DEBUG") != NULL)
+  if (g_getenv ("MUTTER_DEBUG") != NULL)
     {
       meta_set_debugging (TRUE);
       meta_set_verbose (TRUE);

src/ui/ui.c

@@ -1,6 +1,6 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
-/* Metacity interface for talking to GTK+ UI module */
+/* Mutter interface for talking to GTK+ UI module */
 
 /* 
  * Copyright (C) 2002 Havoc Pennington