Added comments controller, model, repo, and the database schema. Modified existing Page model to associate with comments.

app/Http/Controllers/CommentController.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace BookStack\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+use BookStack\Http\Requests;
+
+class CommentController extends Controller
+{
+    
+    public function add(Request $request, $pageId) {
+        // $this->checkOwnablePermission('page-view', $page);
+    }
+    
+    public function update(Request $request, $id) {
+        // Check whether its an admin or the comment owner.
+        // $this->checkOwnablePermission('page-view', $page);
+    }
+    
+    public function destroy($id) {
+        // Check whether its an admin or the comment owner.
+        // $this->checkOwnablePermission('page-view', $page);
+    }
+    
+    public function getLastXComments($pageId) {
+        // $this->checkOwnablePermission('page-view', $page);
+    }
+    
+    public function getChildComments($pageId, $id) {
+        // $this->checkOwnablePermission('page-view', $page);
+    }
+}