Importing the skeleton of system tray implementation and making sure it compiles and works

There was an interesting "problem" due to automatic reference counting
(-fobjc-arc flag).  XCode includes this flag by default, so making sure
that wscript is doing the same thing.
diff --git a/osx/menu-delegate.h b/osx/menu-delegate.h
new file mode 100644
index 0000000..6aa434f
--- /dev/null
+++ b/osx/menu-delegate.h
@@ -0,0 +1,17 @@
+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * @copyright See LICENCE for copyright and license information.
+ *
+ * @author Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ * @author Ilya Moiseenko <iliamo@ucla.edu>
+ */
+
+#import <Cocoa/Cocoa.h>
+
+@interface MenuDelegate : NSObject <NSApplicationDelegate>
+{
+  IBOutlet NSMenu *statusMenu;
+  NSStatusItem * statusItem;
+}
+ 
+@end