Added Java prerequisite note to the downloads page

Change-Id: I2e2cc1ada33eddbf7cfd0b5ef6170cb03253ec35
Signed-off-by: Ernesto Posse <eposse@gmail.com>
diff --git a/content/index.html b/content/index.html
index f031ca4..b7c62b6 100644
--- a/content/index.html
+++ b/content/index.html
@@ -7,6 +7,17 @@
 			Agreement</a> unless otherwise specified.

 	</p>

 

+	<div class="messagebox" style="background-color: #def3fe; border: 1px solid #c5d7e0; color: black; padding: 5px; margin: 1ex 0; min-height: 35px; padding-left: 45px;">

+		<div style="float: left; margin-left: -40px;"><a href="/File:Note.png" class="image"><img alt="Note.png" src="/images/c/cc/Note.png" width="35" height="35" /></a></div>

+			<div>

+				<b>Prerequisites</b><br />

+				

+				You need to install Java 8 (64 bits). You can obtain it <a rel="nofollow" class="external text" href="http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html">here</a>.

+Note that Papyrus-RT <b>will not</b> work with Java 9 or with a 32-bit version of Java 8, or Java 7 and below.

+			</div>

+		</div>

+	</div>

+

 	<h2>There are four ways to install Eclipse Papyrus for Real Time

 		(Papyrus-RT):</h2>