Refactors Newsletters as per @badshark's comments

lib/Newsletter/Renderer/Blocks/Image.php

@@ -0,0 +1,26 @@
+<?php namespace MailPoet\Newsletter\Renderer\Blocks;
+
+use MailPoet\Newsletter\Renderer\StylesHelper;
+
+class Image {
+
+  static function render($element) {
+    $stylesHelper = new StylesHelper();
+
+    $element['width'] = (int) $element['width'];
+
+    $template = '
+    <tr>
+      <td class="mailpoet_col mailpoet_image ' . (($element['padded'] === true) ? "mailpoet_padded" : "") . '"
+          style="' . $stylesHelper->getBlockStyles($element) . '"
+          valign="top">
+        <img style="top:0; left:0; height: auto; width:100%;"
+             src="' . $element['src'] . '"
+             width="' . (($element['padded'] === true) ? $element['width'] - (20 * 2) : $element['width']) . '">
+      </td>
+    </tr>';
+
+    return $template;
+  }
+
+}