- 0.6.2
	* Prevent double removal on index entry
- 0.6.1
	* Update list tool to chainlib 0.4.x arg flags
	* Skip listing of superseded tokens (reverse lookup does not match entry index)
- 0.6.0
	* Use literal keys instead of hashes in registry
- 0.5.0
	* Update python classifiers
- 0.4.3
	* Upgrade deps
- 0.4.2
	* Add contract metadata
- 0.4.1
	* Remove solidity compile warnings
- 0.4.0
	* Upgrade deps
- 0.2.6
	* Add writer cli tool