Oursql3

Simple bugfix release, to fix oursql.__version__ string.

These bugs have had the following fixes:

#838120 (2006, 'MySQL server has gone away') errors can now be mitigated by adding the autoreconnect=True kwargs to the Connection(). This may become the default in future.
#672059 fetchone() will now not give an error when handling DATE columns that are set to NULL/0 when they were blank.
#582124 GIL is now released on the mysql_stmt_fetch() mysql call.

* Fixed a bug in oursql.Connection._escape_string and
oursql.Connection._escape_unicode_string when called with 0-length
strings.
* Fixed FreeBSD support in pstdint.h.
* Worked around a bug in setuptools in setup.py.
* Added support for MYSQL_CONFIG.
* Added many more parameters for oursql.connect.
* Mapped more MySQL errors to oursql exceptions.
* Added oursql.errnos.

- Rebuild of cython source with newer cython, should support python 3.3

* Releasing the GIL for a few more functions that query the remote mysql
server, fixing launchpad bug #582124.
* Fixing a memory leak caused by a half-finished code refactor.
* Working around mysql sometimes returning invalid date data, fixing
launchpad bug #672059.
* Fix problem with charset decoding manifesting as an AttributeError in py3k