Add a Playground for the UI Components (#4301)

* Playground // WIP

* Linting

* Add Examples with code

* CSS Linting

* Linting

* Add Connected Currency Symbol

* 2015-2017

* 2015-2017

* 2015-2017

* 2015-2017

* 2015-2017

* 2015-2017

* 2015-2017

* Added `renderSymbol` tests

* PR grumbles

* Add Eth and Btc QRCode examples

* 2015-2017

* Add tests for playground

* Fixing tests