mempool link added to front page

src/templates/index2.html

@@ -2,7 +2,8 @@
 <div class="center">
      <h3 style="font-size: 12px; margin-top: 20px">
 
-        Server time: {{server_timestamp}} | <a href="/rawtx">Tx pusher </a>
+        Server time: {{server_timestamp}}  | <a href="/mempool">Memory pool</a>
+         | <a href="/rawtx">Tx pusher </a>
          | <a href="/rawkeyimgs">Key images checker</a>
          | <a href="/rawoutputkeys">Output keys checker</a> |