add Class-based custom annotation parsing

src/ZM/Annotation/AnnotationParser.php

@@ -99,6 +99,9 @@ class AnnotationParser
                     continue 2;
                 } elseif ($vs instanceof Middleware) {
                     $middleware_addon = $vs;
+                } elseif ($vs instanceof CustomAnnotation) {
+                    $vs->class = $reflection_class->getName();
+                    ZMBuf::$events[get_class($vs)][] = $vs;
                 }
             }
             foreach ($methods as $vs) {