Adds react-i18next and its provider to react.

Adds translate function with default namespaces and options.

package.json

     "postis": "^2.2.0",
     "react": "15.4.2",
     "react-dom": "15.4.2",
+    "react-i18next": "2.2.0",
     "react-native": "0.41.2",
     "react-native-background-timer": "1.0.0",
     "react-native-immersive": "0.0.4",

react/features/app/components/AbstractApp.js

 import { compose, createStore } from 'redux';
 import Thunk from 'redux-thunk';
 
+import { I18nextProvider } from 'react-i18next';
+import { i18n } from '../../base/translation';
+
 import {
     localParticipantJoined,
     localParticipantLeft
 
         if (route) {
             return (
-                <Provider store = { this._getStore() }>
-                    {
-                        this._createElement(route.component)
-                    }
-                </Provider>
+                <I18nextProvider i18n = { i18n }>
+                    <Provider store = { this._getStore() }>
+                        {
+                            this._createElement(route.component)
+                        }
+                    </Provider>
+                </I18nextProvider>
             );
         }
 

react/features/base/translation/functions.js

+import { translate as reactTranslate } from 'react-i18next';
+
+/**
+ * Wrap a translatable component.
+ *
+ * @param {Component} component - the component to wrap
+ * @returns {Component} the wrapped component.
+ */
+export function translate(component) {
+    // use the default list of namespaces
+    return reactTranslate([ 'main', 'languages' ], { wait: true })(component);
+}

react/features/base/translation/index.js

 export { default as i18n } from './Translation';
 export * from './constants';
+export * from './functions';