Consolidate developer information on one page

[Tom Prince]

<tomprince> https://twistedmatrix.com/trac/wiki/TwistedDevelopment doesn't mention irc.
<glyph> tomprince: https://twistedmatrix.com/trac/wiki/CommitterCheckList does
<tomprince> Nor does https://twistedmatrix.com/trac/wiki/ContributingToTwistedLabs
<glyph> tomprince: but you didn't need me to tell you that since you are _intimately_ familiar with that page, as is everyone else here, right │
* glyph glares at the room
<exarkun> Dear someone who likes wikis,
<exarkun> Please delete the three above wiki pages and create a single new page which presents all the same information in a coherent, non-redundant fashion

[Tom Prince (tom.prince)]

I'm not sure that that they do actually want to be combined. Different audiences want different information, and trying to put it all on one page will make it harder to find the desired information. On the other hand, there are probably redunencies that should be fixed and/or added, as well as cross-links.