Import from Container Engine docs, addition of Tabs functionality, various link fixes

_includes/tabs.html

@@ -0,0 +1,17 @@
+{% assign tabsraw = tabspec | newline_to_br | split: '<br />' %}
+{% assign tabsetname = tabsraw[0] %}
+<script>$(function(){$("#{{tabsetname}}").tabs();});</script>
+<div id="{{tabsetname}}">
+  <ul>{% for tab in tabsraw offset:1 %}{% assign thisTab = tab | split: ',' %}
+    <li><a href="#{{ thisTab[0] | strip | handleize }}">{{ thisTab[0] | strip}}</a></li>{% endfor %}
+  </ul>
+  {% for tab in tabsraw offset:1 %}
+  {% assign thisTab = tab | split: ',' %}
+  {% assign tabLang=thisTab[1] %}
+  {% assign tabFile=thisTab[2] %}
+  {% assign tabGHLink=thisTab[3] %}
+  <div id="{{ thisTab[0] | strip | handleize }}">
+  {% include code.html language=tabLang file=tabFile ghlink=tabGHLink %}
+  </div>
+  {% endfor %}
+</div>