0.04
	- detect crashed transactions by checking for dirty state when accessing
	  global data
	- run recovery if detecting online state and shared lock can be upgraded to
	  exclusive
	- load Scope::Guard in AutoCommit.pm

0.03
	- add auto_commit
	- refactored internals
	- documented various limitations
	- more error checking
	- instances in different processes with global_lock set to different values
	  now interact safely
	- no longer depends on Data::UUID::LibUUID, but prefers it if it is
	  available

0.02
	- Add missing dep
	- Doc fixes
	- add missing txn_do method

0.01
	- Initial release
