doc: add header notice on latest documentation from master
The master branch is considered unstable and under development. We need
to remind developers of this and refer them to the available stable release
documentation.
{% extends "!layout.html" %}
+{% block document %}
+ {% if not is_release %}
+ <div class="admonition important">
+ <p class="admonition-title">Important</p>
+ <p>This is the latest documentation for the unstable development branch of
+ Project ACRN (master).<br/>Use the drop-down menu on the left to select
+ documentation for a stable release such as <a href="/2.7/">v2.7</a>.</p>
+ </div>
+ {% endif %}
+ {{ super() }}
+{% endblock %}
{% block menu %}
{% include "aversions.html" %}
{{ super() }}
