FIX: resolve Controller not failing over to an extension method (Fixes #76)

Currently an issue exists that when a controller calls a method which exists on an extension (i.e Comments()) it incorrectly classed as a relation instead of a method resulting in a SQL error.

This patch works around that issue by directly invoking the method.

_config.php

@@ -28,4 +28,8 @@
 
 if(class_exists('SiteTree') && !Commenting::has_commenting('SiteTree')) {
 	Commenting::add('SiteTree');
+}
+
+if(class_exists('ContentController')) {
+	ContentController::add_extension('ContentControllerCommentsExtension');
 }

code/extensions/CommentsExtension.php

@@ -47,7 +47,7 @@ class CommentsExtension extends DataExtension {
 	 *
 	 * @return PaginatedList
 	 */
-	public function Comments() {
+	public function getComments() {
 		$order = Commenting::get_config_value($this->ownerBaseClass, 'order_comments_by');
 
 		$list = Comment::get()->filter(array(
@@ -132,7 +132,7 @@ class CommentsExtension extends DataExtension {
 			'Parent'					=> $this->owner,
 			'AddCommentForm'			=> $form,
 			'ModeratedSubmitted'		=> $moderatedSubmitted,
-			'Comments'					=> $this->Comments()
+			'Comments'					=> $this->getComments()
 		)));
 	}
 	

code/extensions/ContentControllerCommentsExtension.php

@@ -0,0 +1,11 @@
+<?php
+
+/**
+ * @package comments
+ */
+class ContentControllerCommentsExtension extends Extension {
+	
+	public function Comments() {
+		return $this->owner->dataRecord->getComments();
+	}
+}