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/main.mm b/osx/main.mm
index edc5186..c306608 100644
--- a/osx/main.mm
+++ b/osx/main.mm
@@ -3,11 +3,12 @@
  * @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>
 
-int main(int argc, char *argv[])
+int main(int argc, const char **argv)
 {
-    return NSApplicationMain(argc, (const char **)argv);
+  return NSApplicationMain (argc, argv);
 }