Integrate with Cosmos for Bounties/Hacks

[GTChase]

Fronte End Notes

• Add chain to bounty + hackathon creation forms (staff flag)
• Funder should be able to create bounty with Cosmos
• User should be able to start / stop / submit work with Cosmos
• Funder should be able to payout using web3
• Validate Cosmos wallet addresses
• Funder should can create and payout Cosmos bounties
• Hunter can start and submit work with Cosmos

Back End Notes:

• Transaction verification
• Changes to bounty creation + editing endpoints
• Testing
• sync_pending_fulfillments cron can verify casper transactions
• bounty API can support creation and editing of Casper bounties