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

code from pantheon

* code from pantheon

wp/wp-content/plugins/contact-form-7/includes/pocket-holder.php

@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * Handy trait provides methods to handle dynamic properties.
+ */
+trait WPCF7_PocketHolder {
+
+	protected $pocket = array();
+
+	public function pull( $key ) {
+		if ( isset( $this->pocket[$key] ) ) {
+			return $this->pocket[$key];
+		}
+	}
+
+	public function push( $key, $value ) {
+		$this->pocket[$key] = $value;
+	}
+
+}