Separate source and header files for MutterWindow

compositor.c: Move MutterWindow code to mutter-window.c;
 rename map_win() to mutter_window_map(), etc.

mutter-window-private.h: New private header file for
 MutterWindow functions used internally to the compositor.

compositor-mutter.h: Move MutterWindow declarations to
 mutter-window.h; move a couple of private functions to
 compositor-private.h

compositor-private.h: Move MetaCompScreen declaration to here:
 Conceptually it's private to compositor.c, but MutterWindow
 manipulates some of the lists directly for now.

mutter-plugin.c compositor.c: Don't call mutter_window_effect_completed()
 for MUTTER_PLUGIN_SWITCH_WORKSPACE, but use a new
 mutter_switch_workspace_completed(), since the window is
 just used to identify a screen.

http://bugzilla.gnome.org/show_bug.cgi?id=587251

src/compositor/mutter-window-private.h

@@ -0,0 +1,39 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#ifndef MUTTER_WINDOW_PRIVATE_H
+#define MUTTER_WINDOW_PRIVATE_H
+
+#include <X11/extensions/Xdamage.h>
+#include "compositor-mutter.h"
+
+MutterWindow *mutter_window_new (MetaWindow *window);
+
+void mutter_window_map      (MutterWindow *cw);
+void mutter_window_unmap    (MutterWindow *cw);
+void mutter_window_minimize (MutterWindow *cw);
+void mutter_window_destroy  (MutterWindow *cw);
+
+void mutter_window_maximize   (MutterWindow  *cw,
+                               MetaRectangle *window_rect);
+void mutter_window_unmaximize (MutterWindow  *cw,
+                               MetaRectangle *window_rect);
+
+void     mutter_window_process_damage          (MutterWindow       *cw,
+                                                XDamageNotifyEvent *event);
+gboolean mutter_window_effect_in_progress      (MutterWindow       *cw,
+                                                gboolean            include_destroy);
+void     mutter_window_sync_actor_position     (MutterWindow       *cw);
+void     mutter_window_finish_workspace_switch (MutterWindow       *cw);
+void     mutter_window_update_window_type      (MutterWindow       *cw);
+void     mutter_window_update_shape            (MutterWindow       *cw,
+                                                gboolean            shaped);
+void     mutter_window_update_opacity          (MutterWindow       *cw);
+void     mutter_window_set_hidden              (MutterWindow       *cw,
+                                                gboolean            hidden);
+void     mutter_window_queue_map_change        (MutterWindow       *cw,
+                                                gboolean            should_be_mapped);
+
+void mutter_window_effect_completed (MutterWindow *actor,
+                                     gulong        event);
+
+#endif /* MUTTER_WINDOW_PRIVATE_H */