[Python-3000] Types and classes

[Paul Prescod]

Also, could the types module be renamed "builtin_classes" or
"core_classes" or something like that? It was always a weird name
because it wasn't if it contained all of the types in a Python
distribution. Just a set of core-to-the-implementation ones.

Just out of curiousity: why is the type(x) function valuable when
x.__class__ is a viable alternative and has been one for a long time.

 Paul Prescod