Update examples for v2.0

examples/sections/Sections.php

@@ -1,6 +1,6 @@
 <?php
 
-class Sections extends Mustache {
+class Sections {
 	public $start = "It worked the first time.";
 
 	public function middle() {
@@ -11,4 +11,4 @@ class Sections extends Mustache {
 	}
 
 	public $final = "Then, surprisingly, it worked the final time.";
-}
+}