feat(react-native): react-native and boilerplates support

[prescottprue]

• Initial support for react-native (should solve I.hasOwnProperty("process") #80)
• Import only needed sections of Firebase library ( ssr #72 and Support Boilerplates #53 )

Notes About react-native

Support for react-native is still in the early testing phases. That means the API and/or functionality may change.

If using react-native, make sure you have the following config enabled when creating your store:

import ReactNative from 'react-native'
import { compose, createStore } from 'redux';
import { reactReduxFirebase } from 'react-redux-firebase'
const firebaseConfig = {} // your firebase config object
const initialState = { firebase: { authError: null } };

// then in your config when creating store
const store = createStore(
    makeRootReducer(), 
    initialState,
    compose(
      reactReduxFirebase(
        firebaseConfig,
        {
           rn: ReactNative,
           enableRedirectHandling: false,
           userProfile: 'users' 
         },
      ),
    )
  );

Normal authentication methods, such as firebase.login({provider: 'google', type: 'popup'}), will not work due to Firebase's js library (used internally) not completely supporting react-native. That means you must use firebase.auth().signInWithCredential(credential) until there is more support within the Firebase library.

It might look something like this (untested):

let credential = this.props.firebase.auth.GoogleAuthProvider.credential(token);
this.props.firebase.auth().signInWithCredential(credential)
  .then(() => {
    console.log('auth successful')
  })
  .catch((err) => {
    console.log('error: ', err)
  })

[prescottprue]

react-native branch will remain until v1.4.0 full version is released (not preversions such as v1.4.0-alpha