Plac

Options and flags can now contain dashes (i.e. ``--dry-run`` is valid and
translated into dry_run, you are not forced to use ``--dry-run`` anymore);
restored the monitor support temporarily removed in 0.9.0, fixed an issue
with tuple defaults and fixed the display of the help command; specified
which features are experimental and which features are fully supported

Default values are now displayed in the help message by default;
removed .help and introduced help; removed the special dotted
commands from the usage message; added an ``Interpreter.Exit``
exception; removed the experimental monitor framework because
it is too much platform-dependent; added a reference
to Argh; now plac has its own space on Google Code

Removed a stray newline in the output of plac, as signaled
by Daniele Pighin; fixed a bug in the doctest method raising
non-existing exceptions; turned the notification messages into
unicode strings; removed an ugly SystemExit message
for invalid commands, signaled by Tuk Bredsdorff

Added a monitor framework and a TkMonitor

Fixed the error propagation in ``Interpreter.__exit__``.
Added a note about commandline and marrow.script in the documentation

Fixed a bug with the help of subcommands, signaled by Paul Jacobson;
added the ability to save the output of a command into a file; postponed
the import of the readline module to avoid buffering issues; fixed a
bug with the traceback when in multiprocessing mode