Normalize the template element display

The `template` element shipped in Firefox 22 and Chrome 26. Browsers
without HTML template support should at least hide the element.

normalize.css

@@ -44,10 +44,12 @@ audio:not([controls]) {
 }
 
 /**
- * Address styling not present in IE 8/9.
+ * Address `[hidden]` styling not present in IE 8/9.
+ * Hide the `template` element in IE, Safari, and Firefox < 22.
  */
 
-[hidden] {
+[hidden],
+template {
     display: none;
 }
 

test.html

@@ -96,6 +96,12 @@
         The <var>var element</var> example
         </p>
 
+        <h1>Template content</h1>
+        <template>
+            <h1>{{title}}</h2>
+            <content></content>
+        </template>
+
         <h1>Embedded content</h1>
 
         <h3>audio</h3>