Skylark

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- fix bug: issue9, active connection wasn't closed when database configs was updated
- table_name: add ability to define custom table_name; default table_name: User=>'user', CuteCat=>'cute_cat'

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No changes in API.

- fix, improve docstrings, document, readme..

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Added:

- support for ``group by``
- support for ``having``
- support for keyword ``distinct``

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No changes in API.

- use tuple format of MySQLdb return result instead of dict
- some typofixed

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**not backward compatiable changes:**

Reomved:

- Removed method ``select_without_primarykey``

Changes:

- method ``select`` now won't select primarykeys automatically
- subquery parsing result now was wrapped with ``()``

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Types supporting:

- string, unicode
- numbers: float, int, long
- datetime: datetime, date, time, timedelta
- bool
- Nonetype
- sequence: list, tuple
- dict