[chain] Remove State Access from Auth

[patrick-ogrady]

Resolves: #619

Changes

• Remove Auth access to state until actually needed (when programs are mature) and can be re-added safely (unbounded state access is a DoS as validity can change just before inclusion in ways not related to being out-of-funds, which greatly impacts decoupled verification) -> This still allows ACL but at the Action level rather than abstractly via Auth
• Remove Auth access to Action
• Remove Auth.Verify
• Unify shared interfaces between Action, Actor, Auth in Object
• Update README

Future Work

• Add access to time-delayed/versioned state (to ensure a change to state accessed during a validity check can be observed long before a transaction is sequenced)
• Allow Actor to send a non-native token to pay fees (would require integrated tokens in VM)