Improve support for python-3.3.
Import py33-Pmw-2.0.0rc1 as x11/py-Pmw2.

Pmw is a toolkit for building high-level compound widgets in Python
using the Tkinter module.

It consists of a set of base classes and a library of flexible and
extensible megawidgets built on this foundation. These megawidgets
include notebooks, comboboxes, selection widgets, paned widgets,
scrolled widgets and dialog windows.

This is the python-3.x version of the module.
+ py-Pmw2.
Mark as python-2.x version.
Added x11/py-Pmw2 version 2.0.0rc1
Support Pmw.
Revert unintended commit; pkgsrc not ready yet.
Convert to versioned_dependencies.mk for Pmw.
Update Python section and document versioned_dependencies.mk.
regen
Fix typo.
regen