Merged in feature/from-pantheon (pull request #16)

code from pantheon

* code from pantheon

wp/wp-includes/Requests/src/HookManager.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Event dispatcher
+ *
+ * @package Requests\EventDispatcher
+ */
+
+namespace WpOrg\Requests;
+
+/**
+ * Event dispatcher
+ *
+ * @package Requests\EventDispatcher
+ */
+interface HookManager {
+	/**
+	 * Register a callback for a hook
+	 *
+	 * @param string $hook Hook name
+	 * @param callable $callback Function/method to call on event
+	 * @param int $priority Priority number. <0 is executed earlier, >0 is executed later
+	 */
+	public function register($hook, $callback, $priority = 0);
+
+	/**
+	 * Dispatch a message
+	 *
+	 * @param string $hook Hook name
+	 * @param array $parameters Parameters to pass to callbacks
+	 * @return boolean Successfulness
+	 */
+	public function dispatch($hook, $parameters = []);
+}