Add more instructions to download pg

Author: heathermiller

_layouts/downloadpage.html

@@ -23,6 +23,7 @@ <h2>The most popular way to get Scala is either using Scala through sbt, the Sca
             <div class="number-step">1</div>
             <div class="text-step">
               <h3>First, make sure you have the Java 8 JDK installed.</h3>
+              <p>To check, open the terminal and type:</p>
               <p><code>java -version</code><span>(Make sure you have version 1.8.)</span></p>
               <p><i>(If you don't have it installed, <a href="http://www.oracle.com/technetwork/java/javase/downloads/index.html">download Java here</a>.)</i></p>
             </div>