Added 'debug' option to serve() to use Minify_Lines

lib/Minify/Source.php

@@ -90,6 +90,16 @@ class Minify_Source {
 		    : $content;
     }
     
+    /**
+     * Get id
+     *
+     * @return string
+     */
+    public function getId()
+    {
+        return $this->_id;
+    }
+    
     /**
      * Verifies a single minification call can handle all sources
      *