Moved entity interfaces into parent folder. Fixes #504

src/Entities/AuthCodeEntityInterface.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace League\OAuth2\Server\Entities;
+
+interface AuthCodeEntityInterface extends TokenInterface
+{
+    /**
+     * @return string
+     */
+    public function getRedirectUri();
+
+    /**
+     * @param string $uri
+     */
+    public function setRedirectUri($uri);
+}