Rolled out reference pages to all entities, added testing

Including testing to check permissions applied to listed references.

resources/views/chapters/references.blade.php

@@ -0,0 +1,21 @@
+@extends('layouts.simple')
+
+@section('body')
+
+    <div class="container small">
+
+        <div class="my-s">
+            @include('entities.breadcrumbs', ['crumbs' => [
+                $chapter->book,
+                $chapter,
+                $chapter->getUrl('/references') => [
+                    'text' => trans('entities.references'),
+                    'icon' => 'reference',
+                ]
+            ]])
+        </div>
+
+        @include('entities.references', ['references' => $references])
+    </div>
+
+@stop