- 0.1.2
	* Add CLI inspection tools
- 0.1.1
	* 
- 0.1.0
	* Replace state transitions with shep
- 0.0.3
	* cli tool for listing queue by address
	* ensure lowercase hex input in db
	* exportable unittest utilities
- 0.0.2
	* add fs backend
	* add flexible data directory
	* factor out sql backend as module
- 0.0.1 (unreleased)
	* add queue states
	* add queries
	* add tx creation helper