separate trial release (was Re: [Twisted-Python] Twisted Jabber

[Marcin Kasperski]

> However, a point in JP's favor: there are source files distributed 
> with core (twisted/test/*) that *import* code from Trial.  Test cases 
> seem to be, in every sense, a bit of a gnarly special case.
>
testcases are not necessary for production installation, just as 
technical docs are. In fact testcases, trial, docs etc are 
developer-environment tools, not production-environment tools.

Maybe it could make sense to distribute:
- twisted-core - bunch of libraries performing the twisted job
- twisted-dev - trial, testcases, docs etc