Add extra features

[milkyklim]

• Vault strategy holdings
• Vault unique address count
• Vault volume over 24 hours
• Treasury pool balance (and treasury events)
• Governance staker count
• Governance staker count over time (stake/unstake events)
• Governance staker count percent change over 24 hours
• Governance rewards (unclaimed)
• YFI staked in governance
• YFI holder count
• YFI 24 hour volume

Originally posted by @x48-crypto in #14 (comment)