[Edu-sig] Link to RUR-PLE added

[Kirby Urner]

Finally got a couple updates to:
http://www.python.org/sigs/edu-sig/

i.e. André's RUR-PLE and Ipython.

Not an easy process, as pydotorg is undergoing changes and some of the web
based instructions on how to update pages is obsolete.  

Under the current (changing) setup, A.M. Kuchling had to do the final push
to the old server, as I the old ssh-based update method is no longer
accessible to me.

Soon, making changes will be easy again.  I believe I've got the svn process
down.

Kirby