- 0.2.2
	* Fix missing symbol crashes related to race conditions
- 0.2.1
	* Receive removed race checks from chainqueue
- 0.2.0
	* primitive race condition handling between fs access of sync and queue
	* re-enable throttling based on in-flight transaction count
- 0.1.2
	* add settings object
- 0.1.0
	* consume non chain-specific code 
- 0.0.1
	* chainqueue and chainsyncer migration
	* environment base