Update way a subprocess is launched for Mac OS X.

Another applet mechanism has been developed for Python on Mac OS X and
trying to use the -c "__import__('run').main()" trick is just not working.

macosx_main.py is a new file which should be used as the startup file for
Mac OS X applet bundles. This startup file understands a -p option, which
when seen will start run.main(). When running as an applet, this seems like
the best approach.

Lib/idlelib/run.py

@@ -2,6 +2,8 @@ import sys
 import time
 import socket
 
+import boolcheck
+
 import CallTips
 import RemoteDebugger
 import RemoteObjectBrowser