[Urwid] python-urwid Debian package

[Ian Ward]

I have replaced the old "python2.X-urwid" packages in the package 
repository on excess.org with a single "python-urwid" package.  This 
brings these packages in line with the latest Debian Python packaging 
policies.

The python-urwid packages on excess.org are now identical to the ones 
that will appear in the official Debian repositories (they will just 
appear a little earlier).

When you want to upgrade Urwid you must now use the "python-urwid" package.

I have also included source packages, so you can also add a deb-src line 
to your sources.list if you like.

Ian