Clime

------

1. Fixed the bug with generator -- issue `12
<https://github.com/moskytw/clime/issues/12>`_.

------

1. It now supports the `ignore_return` in :py:class:`~clime.core.Program` class.
2. Added a shortcut, :py:func:`~clime.core.customize`, of using Program class.
3. Fixed the support of the ``-kmeta`` format in docstring.

------

1. It now uses `<meta>` instead of `META`.
2. It supports more metavars, include `<json>` for the string in json format.
3. It supports more options of creating a program, include `white_list`,
`black_list`, `ignore_help`, `debug`, ...
4. It repects `__all__` now.
5. Refactored the code a lot and the whole file structure.