Adding compatibility notes to the older releases.

Change-Id: I002c5a4af32d26b07ef43e714e306eff03c32b80
diff --git a/downloads/download.php b/downloads/download.php
index ae2c878..ae82ca4 100644
--- a/downloads/download.php
+++ b/downloads/download.php
@@ -78,12 +78,24 @@
 	  <ul class="fa-ul hidden-print"> 
         <li><i class="fa fa-angle-double-right orange fa-fw"></i><b>Neon:</b> <a href="http://download.eclipse.org/gendoc/updates/milestones/0.7.0/M1/neon">Gendoc v0.7.0-M1</a> 
         	( or download as <a href="http://www.eclipse.org/downloads/download.php?file=/gendoc/milestones/0.7.0/M1/neon/org.eclipse.gendoc.incubation.update-site-0.7.0-M1-neon.zip">archive</a>) (Capella 1.2.x)
+			<ul>
+				<li>Compatibility with <b>Papyrus 2.0.x</b></li> 
+				<li>Compatibility with <b>Sirius 5.1.x / Capella 1.2.x</b></li> 
+			</ul>
 		</li>
         <li><i class="fa fa-angle-double-right orange fa-fw"></i><b>Mars:</b> <a href="http://download.eclipse.org/gendoc/updates/milestones/0.7.0/M1/mars">Gendoc v0.7.0-M1</a> 
         	( or download as <a href="http://www.eclipse.org/downloads/download.php?file=/gendoc/milestones/0.7.0/M1/mars/org.eclipse.gendoc.incubation.update-site-0.7.0-M1-mars.zip">archive</a>) (Capella 1.1.x)
+			<ul>
+				<li>Compatibility with <b>Papyrus 1.1.x</b></li> 
+				<li>Compatibility with <b>Sirius 4.1.x / Capella 1.1.x</b></li> 
+			</ul>
 		</li>
         <li><i class="fa fa-angle-double-right orange fa-fw"></i><b>Juno:</b> <a href="http://download.eclipse.org/gendoc/updates/milestones/0.7.0/M1/juno">Gendoc v0.7.0-M1</a> 
         	( or download as <a href="http://www.eclipse.org/downloads/download.php?file=/gendoc/milestones/0.7.0/M1/juno/org.eclipse.gendoc.incubation.update-site-0.7.0-M1-juno.zip">archive</a>) (Capella 1.0.x)
+			<ul>
+				<li>Compatibility with <b>Papyrus 0.9.2</b></li> 
+				<li>Compatibility with <b>Sirius 3.1.x / Capella 1.0.x</b></li> 
+			</ul>
 		</li>
 	  </ul>