Update README so people can fork wallet at event

[johannbarbie]

No description provided.

[TimDaub]

Scope

• We'd like hackers at cccamp19 and EthBerlinZwei to propose cool new coordination algorithms that could fight in-game climate change
• For that though, hackers need an easy and quick way to work on the burner wallet and all its peripheral technology
• I'm proposing to use the README.md file as the primary on-boarding document for hackers

Deliverables

• Once most work as been completed on this repo, update the README.md file with the latest available data (e.g. contract addresses for mainnet etc)
• Consider that hackers might want to test their algorithms on a test net first. Make sure they're able to do that too
• Provide hackers with an easy on-boarding into working on the wallet too. Maybe some documentation or a contact (e.g. "write to @vrde on Slack") would help here too

Roles

bounty gardener: @TimDaub / 10%
bounty worker: name / 75%
bounty reviewer: name / 15%