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* Brought back ``HISTORY.rst``.
* Add ``mysqlparse.parse`` function.
* Add ``six`` as a dependency to make writing Py2 and Py3 compatible code easier.
* Add support for ``ALTER TABLE .. MODIFY [COLUMN]`` statements.
* Add support for ``ALTER TABLE .. DROP *`` statements.
* Move version string from ``setup.py`` into ``mysqlparse``.