[Twisted-Python] Bug guidelines

[Mary Gardiner]

I'm going to write a "bug guidelines" doc for Twisted -- less generic
"please file helpful bugs" and more specific Twisted bug guidelines.

In particular, it's going to say who to assign bugs in particular
modules to. If you own a module or want bugs assigned to you by default,
please add details to
http://www.twistedmatrix.com/users/roundup.twistd/twisted/issue492

If you have questions about Twisted bug reporting or bug fixing process
that you want answered, or answers you want documented, please also add
to http://www.twistedmatrix.com/users/roundup.twistd/twisted/issue492

-Mary