set basic layout. adding status bar

bower_components/bootstrap/site/_includes/callout-danger-async-methods.md

@@ -0,0 +1,8 @@
+{% capture callout %}
+#### Asynchronous methods and transitions
+
+All API methods are **asynchronous** and start a **transition**. They return to the caller as soon as the transition is started but **before it ends**. In addition, a method call on a **transitioning component will be ignored**.
+
+[See our JavaScript documentation for more information]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/javascript/).
+{% endcapture %}
+{% include callout.html content=callout type="danger" %}