Rebase against upstream to have more features and potential fixes

## Scope
E.g. wallet.leapdao.org doesn't have Address Book feature yet. So we'd like to take all progress from upstream

## Gains

- Address book makes sending DAI much easier as you don't have to always confirm addresses when paying contributors

## Roles
Gardener @TimDaub 10%
Worker 75%
Reviewer 15%