Fix wording on this

project_template/templates/armstrong/includes/welcome.html

@@ -18,8 +18,10 @@ <h2>Everything Worked!</h2>
     </li>
 
     <li>
-        Run <code>armstrong load_demo_data</code> inside your project
-        which will scrape the last 10 days worth of content from
+        Install the <a href="https://github.com/armstrong/armstrong.cli.experimental">armstrong.cli.experimental</a>
+        package and run <code>armstrong load_demo_data</code> from inside
+        your project directory.  That command scrapes the last 10 days worth
+        of content from
         <a href="http://en.wikinews.org/wiki">WikiNews</a>.
     </li>
 </ol>