Drupal 7 - Theme Settings WYSIWYG Field

page.tpl.php

<?php if (theme_get_setting('features_title')): ?>
  <div class="features-title">
    <?php $featurestitle = theme_get_setting('features_title'); ?>
    <?php print check_markup($featurestitle['value'], $featurestitle['format']); ?>
  </div>
<?php endif; ?>

theme-settings.php

function THEMENAME_form_system_theme_settings_alter(&$form, $form_state, $form_id = NULL){
  if (isset($form_id)) {
    return;
  }
  $form['front_page'] = array(
    '#type'         => 'fieldset',
    '#title'        => t('Front Page'),
    '#description'  => t('Add/edit titles for each unique section of the Front Page.'),
  );
  $featurestitle = theme_get_setting('features_title');
  $form['front_page']['features_title'] = array(
    '#type' => 'text_format',
    '#title' => t('Features Title'),
    '#default_value' => $featurestitle['value'],
    '#format' => 'full_html',
  );
}