add help to web interface

Lib/WebService.php

@@ -31,6 +31,9 @@ abstract class WebService
             $data["error"]["code"] = $e->getCode();
             $data["error"]["reason"] = $e->getMessage();
             $data["error"]["name"] = $e->getName();
+
+            $data['extra'] = Help::exception($e, $this, $this->func);
+
             $this->status = 400;
 
             Logger::info($e->getName(), 'error');