Support for Firebase

[JosefJezek]

Firebase + Redux + RxJS

• https://medium.com/quick-code/how-to-integrate-react-redux-and-firebase-in-3-simple-steps-c44804a6af38
• https://medium.com/quick-code/adding-authentication-to-react-redux-firebase-app-f0efcb1c519a
• https://firebase.googleblog.com/2018/09/introducing-rxfire-easy-async-firebase.html
• https://stackoverflow.com/questions/52113277/load-firebase-asynchronously-using-rxjs-or-any-other-package-and-then-use-it-a
• https://github.com/davideast/rxfire-samples/blob/master/src/react/index.tsx
• https://github.com/redux-observable/redux-observable
• https://dev.to/andrejnaumovski/async-actions-in-redux-with-rxjs-and-redux-observable-efg
• https://github.com/davideast/rxfire-samples/tree/master/src/firestore-cloud-storage
• http://rudiyardley.com/redux-single-line-of-code-rxjs/
• https://medium.com/@mohandere/rxjs-5-in-5-minutes-1c3b4ed0d8cc