Polygon support

Polygon support (#422)

* Add configs for polygon

* Point to polygon contracts

* Add now config

* Do not hard code 1 gwei

* hardcode polygon

* Update README

* Parse ipfs avatar

* Fix  overlay bug on mobile

* Wait calling participant list until logged in

* Fix z-index on mobile dropdown and onboard popup

* Fix POAP checkin

* Fix deploy command

* Add default snapshot image

* Fix error of not showing votes with multiple choices

* Updata onboardjs and change walletconnect setting (#420)

* Bump version to 1.2.0

Last xDAI release

This is the last known deployed version to xdai.kickback.events before supporting polygon

This is the last known deployed version to live.kickback.events before big merge

This is the last known deployed version to live.kickback.events before big merge

It's about time to start making releases!

Merge pull request #277 from wearekickback/dev

Added warning when not logged in (#276)