remove <gtkmm/gtkmm.h> from all files, plus a small fix related to map/realize handling

git-svn-id: svn://localhost/trunk/ardour2@145 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/streamview.h

@@ -25,13 +25,15 @@
 #include <map>
 #include <cmath>
 
-#include <gtkmm.h>
-
 #include <ardour/location.h>
 #include "enums.h"
 #include "simplerect.h"
 #include "canvas.h"
 
+namespace Gdk {
+	class Color;
+}
+
 namespace ARDOUR {
 	class Route;
 	class DiskStream;