0.12
	- add auto_checkpoint

0.11
	- Enable locking by default
	- Add deadlock detection (enabled by default)
	- txn_begin/txn_commit/txn_rollback no longer take arbitrary transaction
	  arguments due to deadlocks caused when not reenabling the parent
	  transaction after rolling back a child transaction.

0.10
	- Try to not die if DB_MULTIVERSION isn't defined and the user is not trying to use it

0.09
	- Add version detection logic
	- Better diagnostics in test suite

0.08
	- In the test suite, report $BereleyDB::Error whenever a status assertion
	  fails.

0.07
	- Only evaluate DB_TXN_SNAPSHOT when it will actually be meaningful to
	  avoid errors on BDB versions that don't support it 

0.01-0.06
	- Initial release cycle
