Adds Expo (a framework that uses react-native for every device) initial setup, with a WebView pointing to https://cashtabapp.com. This is a first step torwards using the Expo framework for Android, iOS and web.
- Group Reviewers
cd web/cashtab/mobile, npm install and then npm start. For Android you can download the Expo App and scan the QR code provided for testing. It should open a loading screen and then the CashTab website.