Clime

------

1. Let debug raise the original exception.

----

1. Support Python 3.
2. Fixed an error when no usage. Thanks `uranusjr
<https://github.com/moskytw/clime/pull/25>`_.
3. Let exception just be raised when debug.

------

1. It now generates metavar for argument which has default value.
2. Fixed argument whose default is bool took next command line argumnet as its
value. (``--bool shouldnttake``)
3. Fixed it caught option-like string in option description.
4. Refactored the :meth:`~clime.core.Command.parse`.

------

1. Make the setup.py better.
2. Refactored the :mod:`clime.__main__`.
3. Refactored the :mod:`clime.now`.

------

1. Renamed the :meth:`~clime.core.Command.get_usage` to
:meth:`~clime.core.Command.build_usage`.
2. Refactored the code and the doc.

------

1. Fixed a bug of finding docstring of command.
2. Added support for using ``f`` and ``float`` as metavar in docstring. Thanks
for the contribution from `mail6543210
<https://github.com/moskytw/clime/pull/18>`_.