#60 Twisted completions are out of date

[Jp Calderone]

See http://twistedmatrix.com/trac/ticket/3074 - _tkmktap and _websetroot commands don't exist anymore. zsh should modify the Twisted completions it ships to stop referring to them. Ideally it would also change the completion stuff so that projects can change the commands they ship without break zsh completions.