Log Message:
Import py-nevow from pkgsrc-wip.  Packaged by Michal Pasternak and
maintained by Siegmund Fuehringer.

Nevow is a next-generation web application templating system, based on
the ideas developed in the Twisted Woven package.  Its main focus is
on separating the HTML template from both the business logic and the
display logic, while allowing the programmer to write pure Python code
as much as possible.  It separates your code into 'data' and 'render'
functions, a simplified implementation of traditional MVC.  It has
various parts which can be used individually or as a whole, integrated
web solution.