[Twisted-Python] New scripts

[Juergen Hermann]

Hi!

mktap is now fully moved to twisted.scripts. Would be nice if people
moved the commands they use the most, or are related to the part they
developed.

What to do:

 1. Copy the code of the command to twisted/scripts/command.py. Then
first commit it unchanged, so there is a clear history!

 1. Move as much code as possible into a function named run(); try to
avoid top-level code if you can, since that is a problem for doc-tools,
pychecker, etc.

 2. Replace the command in bin/command by its stub, i.e. by the new
preamble + the import/run() combo. Don't skip this step, since
otherwise ppl will start to edit at two places, which leads to chaos!

See bin/mktap and twisted/scripts/mktap.py for an example.


In the long run, especially when all commands are moved, be can remove
the bin directory, since it's created in build/scripts anyway. For now,
it allows smooth transition.

Ciao, Jürgen