[Twisted-Python] Coil refactor more or less done

[Itamar Shtull-Trauring]

Andrew Bennetts wrote:

 > Say, is there anyway to do "offline" editing of the configuration held
 > in a tap?

Glyph was discussing this. It could be done very easily, basically by not
activating Ports. At some point we'll probably set something where you use 
coil to edit an Application isntance that is *different* from the one that 
is running, so that coil doesn't show up in the ports list.