Add option to delete sources with support in all three backends

lib/RippingCluster/Source/Plugin/Bluray.class.php

@@ -117,6 +117,20 @@ class RippingCluster_Source_Plugin_Bluray extends RippingCluster_PluginBase impl
         return true;
     }
     
+    /**
+     * Permanently deletes the given source from disk
+     * 
+     * @param RippingCluster_Source $source Source object to be deleted
+     * @return bool
+     */
+    public static function delete($source_filename) {
+        if ( ! self::isValidSource($source_filename)) {
+            return false;
+        }
+        
+        return RippingCluster_Main::rmdir_recursive($source_filename);
+    }
+
 }
 
 ?>