Django-oraclepool

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- Added test suite including performance test to demonstrate benefits
- Tested and made compatible with django 1.2 (as well as django 1.1)
- Cleaned up the code and factored out anything that wasnt specific to pooling,
subclassing most components from the standard Oracle engine.
- Modified logging options so DEBUG switches on log to screen and EXTRAS['log']
switches logging to file option separately.

[Ed Crewe]

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- Commented out debug print statements from DatabaseWrapper._cursor which broke install in wsgi
- Added DatabaseWrapper.__init__ like the oracle backend with client, creation and introspection
borrowed from it, since creation is expected in django 1.1.1 code.
- Added default value of None for settings in DatabaseWrapper._cursor since this argument is not
expected in django 1.1.1 code.
- Added DATABASE_EXTRAS dictionary to set all the session parameters from django config.
- Added session pool settings report method, to check these.
- Added python logger option and sql_log middleware

[Ed Crewe]

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* Initial release - packaging of code from http://code.djangoproject.com/ticket/7732

[Taras Halturin, et al.]