Add Flexbox helpers documentation

docs/_includes/elements/flexbox-helper-table.html

@@ -0,0 +1,16 @@
+<table class="table is-bordered">
+  <thead>
+    <tr>
+      <th>Class</th>
+      <th>Property: Value</th>
+    </tr>
+  </thead>
+  <tbody>
+    {% for value in include.values %}
+      <tr>
+        <td><code>is-{{ include.property }}-{{ value }}</code></td>
+        <td><code>{{ include.property }}: {{ value }}</code></td>
+      </tr>
+    {% endfor %}
+  </tbody>
+</table>

docs/_includes/elements/link.html

@@ -14,6 +14,11 @@
         <span class="bd-link-counter"></span>
       {% endif %}
     </figure>
+    {% if include.new %}
+      <span style="float: right;" class="ml-2 tag is-primary">
+        New!
+      </span>
+    {% endif %}
     {{ include.name }}
   </h2>
   <p class="bd-link-subtitle">