Add release notes section in Overview (#122)

Author: akaroml

src/overview/assets/index.html

@@ -210,6 +210,17 @@ <h3 class="font-weight-light">Microservices</h3>
             </div>
           </div>
         </div>
+        <div class="row mb-3">
+          <div class="col">
+            <h3 class="font-weight-light">Release Notes</h3>
+            <div>
+              <a href="command:java.showReleaseNotes?%220.6.0%22" title="February 2019 Release Notes">February 2019</a>
+            </div>
+            <div>
+              <a href="command:java.showReleaseNotes?%220.5.0%22" title="November 2018 Release Notes">November 2018</a>
+            </div>
+          </div>
+        </div>
         <div class="row mb-3">
           <div class="col">
             <h3 class="font-weight-light">Help</h3>