Conduct a full audit.

[0xTranqui]

full audit of database + 721 impl for vulnerabilities, gas optimization, etc

[salieflewis]

Opened a discussion around this here

[0xTranqui]

we still want an audit, but theres more work to be done. protocol has changed a lot since the time we put this first issue up. will need to document new state much more thoroughly before doing a formal audit