`final` version tracking issue.

[zie1ony]

Interface stabilization phase:

• Refactor voting interface.
• Complete bid escrow algorith.
• Special Onboarding.
• All variables and Gherkin tests. #121
• Slashing in Voters.
• Slashing in BidEscrow.
• DOS Fee based on Dolars.
• Voters events.
• BidEscrow events.
• Move token ids increments into token contracts.
• Centralize voting id generations.
• Grace Period

Refactor phase:

• Refactor DAOWorld.
• Refactor Bid Escrow and Governance Voting.
• Fix number conversions.
• Tests for all contracts in Gherkin.
• Refactor Reputation.
• Bid Escrow Bidding tests.
• Code documentation.

Refactor plan:

Voting rewrite plan:

• Put validation into separate structures.
• Rename governance_voting to voting_engine and voting to voting_state_machine.
• Move stuff from bidescrow down to voting_engine.
• Remove from bidescrow usages of to_real_voting_id and operate on tuple (voting_id, voting_type).
• Move bidding and job_offers logic into separate module and use in bidescrow.
• Unify Informal and Formal under one VotingStateMachine.