Moving pickletools.py from the sandbox into the std library. I started

this over the weekend, and it made faster & better progress than I
expected -- it's already useful <wink>.

Lib/test/test_pickletools.py

+import pickletools
+from test import test_support
+test_support.run_doctest(pickletools)

Misc/NEWS

@@ -122,6 +122,10 @@ Extension modules
 Library
 -------
 
+- The new pickletools.py contains lots of documentation about pickle
+  internals, and supplies some helpers for working with pickles, such as
+  a symbolic pickle disassembler.
+
 - Xmlrpclib.py now supports the builtin boolean type.
 
 - py_compile has a new 'doraise' flag and a new PyCompileError