doc: Add Node Dublin to community page

doc/community/index.html

@@ -129,24 +129,34 @@
               the main event in the United States; they are organized by
               <a href="http://www.mikealrogers.com/">Mikeal Rogers</a>.
             </p>
+
+            <p>
+              <a href="http://nodedublin.com/">Node Dublin</a> is a Node
+              conference in Dublin Ireland, organized by Cian O'Maiden.
+            </p>
+
             <p>
               <a href="http://nodefest.jp/">NodeFest (東京Node学園祭)</a> is
               organized by the <a href="http://nodejs.jp">Node.js Japan user
               group</a>.
             </p>
+
             <p>
               <a href="http://nodecamp.de/">NodeCamp.de</a> in Cologne,
               Germany is organized by <a href="railslove.de">Rails Love</a>.
             </p>
+
             <p>
               An <a href="http://nodejsconf.it/">Italian Node.js
               Conference</a> exists as well.
             </p>
+
             <p>
               <a href="http://nodesummit.com/">Node Summit</a> is a conference
               in San Francisco focusing on the adoption of Node in larger
               companies.
             </p>
+
             <p>
               <a href="http://jsconf.com/">JSConf</a> organizes the main
               JavaScript conferences.