upgraded Ember and integrated Bootstrap 4

Upgraded to Ember JS 2.16.x release. This upgrade uses the new JavaScript modules API syntax.

Integrated Bootstrap 4 Beta 2 via package.json and associated popper.js library. Overridden Bootstrap styles using bootstrap.scss -- this file selectively imports the modules we need.

gui/app/pods/auth/forgot/controller.js

@@ -9,10 +9,12 @@
 //
 // https://documize.com
 
-import Ember from 'ember';
+import { inject as service } from '@ember/service';
 
-export default Ember.Controller.extend({
-	userService: Ember.inject.service('user'),
+import Controller from '@ember/controller';
+
+export default Controller.extend({
+	userService: service('user'),
 
 	actions: {
 		forgot: function (email) {

gui/app/pods/auth/forgot/route.js

@@ -9,11 +9,13 @@
 //
 // https://documize.com
 
-import Ember from 'ember';
+import { inject as service } from '@ember/service';
+
+import Route from '@ember/routing/route';
 import constants from '../../../utils/constants';
 
-export default Ember.Route.extend({
-    appMeta: Ember.inject.service(),
+export default Route.extend({
+    appMeta: service(),
 
 	beforeModel() {
 		if (this.get('appMeta.authProvider') === constants.AuthProvider.Keycloak) {

gui/app/pods/auth/forgot/template.hbs

@@ -1,6 +1,6 @@
 <div class="auth-box">
     <div class="logo">
-        <img src="/assets/img/logo-color.png" title="Documize" alt="Documize" class="responsive-img" />
+        <img src="/assets/img/logo-color.png" title="Documize" alt="Documize" class="img-fluid" />
     </div>
     <div class="login-form">
         {{forgot-password forgot=(action 'forgot')}}