Documentation for PythonOption

[Jim Gallacher]

We are slowly acquiring a number of "reserved" PythonOption keywords 
which should likely be collected in one place so we don't end up with 
any name collisions. Does the PythonOption page in section 5.4.10 seem 
most appropriate? eg.

http://www.modpython.org/live/current/doc-html/dir-other-po.html
I'm thinking of something fairly simple - just a list of reserved 
keywords with a reference link to the appropriate section of the docs.

Jim