[Twisted-Python] http://twistedmatrix.com/ trac installation updated

[exarkun at twistedmatrix.com]

Hi all,

Thomas and I have finished upgrading the trac installation on 
http://twistedmatrix.com/ to 0.11.6.  We expect that this will resolve a 
number of the issues the site has had.

If you notice anything broken about the website now, please point it 
out.

Jean-Paul