added summary to header for single collection.

view/common/header-default.phtml

@@ -11,10 +11,12 @@
            title="an arc-hive project"
            alt="arc-hive logo" />
     <?php endif; ?>
-    <h1 class="site-name"><?php echo $site->title(); ?></h1>
+    <h1 class="site-name">
+      <?php echo $site->title(); ?>
+    </h1>
     <h2 class="site-description">
       <?php if ($summary): ?>
-        <?php echo nl2br($this->escapeHtml($summary)); ?>
+        <?php echo $site->displayDescription(); ?>
       <?php else: ?>
         an integrative digital bio-art platform
       <?php endif; ?>