document milestones update site

Change-Id: I408d7efd07b078cc4872817727feea00f2fc121c

doc/org.eclipse.emf.parsley.doc.websitegen/src/org/eclipse/emf/parsley/doc/websitegen/generator/Download.xtend

@@ -64,6 +64,7 @@ class Download extends AbstractWebsite {
 							(EMF Parsley DSL requires Xtext 2.8.3, which has to be taken from http://download.eclipse.org/modeling/tmf/xtext/updates/composite/releases/ so make sure you add this update site before installing the DSL feature - included in the SDK).</li>
 						<li>0.3.x: <a href="http://download.eclipse.org/emf-parsley/updates/0.3">http://download.eclipse.org/emf-parsley/updates/0.3</a>
 							(EMF Parsley DSL requires Xtext 2.7.3, which has to be taken from http://download.eclipse.org/modeling/tmf/xtext/updates/composite/releases/ so make sure you add this update site before installing the DSL feature - included in the SDK).</li>
+					<li>Milestones: <a href="http://download.eclipse.org/emf-parsley/milestones/">http://download.eclipse.org/emf-parsley/milestones/</a></li>
 					<li>Latest Stable Nightly Build: <a href="https://hudson.eclipse.org/emf-parsley/job/emf-parsley-nightly/lastSuccessfulBuild/artifact/target/repository/">https://hudson.eclipse.org/emf-parsley/job/emf-parsley-nightly/lastSuccessfulBuild/artifact/target/repository/</a></li>
 					<li>Latest Stable Snapshot Build: <a href="https://hudson.eclipse.org/emf-parsley/job/emf-parsley-tycho-gerrit/lastSuccessfulBuild/artifact/target/repository/">https://hudson.eclipse.org/emf-parsley/job/emf-parsley-tycho-gerrit/lastSuccessfulBuild/artifact/target/repository/</a></li>
 					</ul>