Changes from 2.0 to 2.1

Nested Scopes now work as expected

Rich Comparison method names (__lt__, __ne__, etc)

Warning Framework
 import warnings
 warnings.filterwarnings(action = 'ignore', 
                         message='.*regex .* deprecated',
                         category=DeprecationWarning, 
                         module = '__main__')

pydoc, doctest/PyUnit, usability improvements to the time module

__all__ variable