added __all__ lists to a number of Python modules

added test script and expected output file as well
this closes patch 103297.
__all__ attributes will be added to other modules without first submitting
a patch, just adding the necessary line to the test script to verify
more-or-less correct implementation.

Lib/copy_reg.py

@@ -6,6 +6,8 @@ C, not for instances of user-defined classes.
 
 from types import ClassType as _ClassType
 
+__all__ = ["pickle","constructor"]
+
 dispatch_table = {}
 safe_constructors = {}