Ignore -psn_0_* argument on OS X.

See #384.

qutebrowser/qutebrowser.py

@@ -119,7 +119,14 @@ def get_argparser():
 def main():
     """Main entry point for qutebrowser."""
     parser = get_argparser()
-    args = parser.parse_args()
+    if sys.platform == 'darwin' and getattr(sys, 'frozen', False):
+        # Ignore Mac OS X' idiotic -psn_* argument...
+        # http://stackoverflow.com/questions/19661298/
+        # http://sourceforge.net/p/cx-freeze/mailman/message/31041783/
+        argv = [arg for arg in sys.argv[1:] if not arg.startswith('-psn_0_')]
+    else:
+        argv = sys.argv[1:]
+    args = parser.parse_args(argv)
     if args.json_args is not None:
         # Restoring after a restart.
         # When restarting, we serialize the argparse namespace into json, and