Moved most of Mac/Lib hierarchy to Lib/plat-mac: it can be used both

in MacPython-OS9 and MacPython-OSX (or the equivalent unix Python on
Mac OS X). The only items remaining in Mac/Lib are modules that are
meaningful only for MacPython-OS9 (CFM stuff, MacPython preferences
in resources, etc).

Lib/plat-mac/appletrunner.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# This file is meant as an executable script for running applets.
+# BuildApplet will use it as the main executable in the .app bundle if
+# we are not running in a framework build.
+
+import os
+import sys
+for name in ["__rawmain__.py", "__rawmain__.pyc", "__main__.py", "__main__.pyc"]:
+	realmain = os.path.join(os.path.dirname(os.path.dirname(sys.argv[0])),
+					  "Resources", name)
+	if os.path.exists(realmain):
+		break
+else:
+	sys.stderr.write("%s: cannot find applet main program\n" % sys.argv[0])
+	sys.exit(1)
+sys.argv.insert(1, realmain)
+os.execve(sys.executable, sys.argv, os.environ)