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

code from pantheon

* code from pantheon

wp/wp-content/plugins/wordpress-seo/src/presenters/abstract-presenter.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Yoast\WP\SEO\Presenters;
+
+/**
+ * Abstract_Presenter class.
+ */
+abstract class Abstract_Presenter {
+
+	/**
+	 * Returns the output as string.
+	 *
+	 * @return string The output.
+	 */
+	abstract public function present();
+
+	/**
+	 * Returns the output as string.
+	 *
+	 * @return string The output.
+	 */
+	public function __toString() {
+		return $this->present();
+	}
+}