Add issues and remove old links

app/templates/base.html

@@ -30,10 +30,13 @@
             <li class="active"><a href="index.html">Overview</a></li>
           </ul>
           <ul class="nav navbar-nav">
-            <li class="active"><a href="intradom.html">Intra DOM Calibration</a></li>
+            <li class="active"><a href="#">Intra DOM Calibration</a></li>
           </ul>
           <ul class="nav navbar-nav">
-            <li class="active"><a href="k40rate_dist.html">K40 Rate Dist</a></li>
+            <li class="active"><a href="#">K40 Rate Dist</a></li>
+          </ul>
+          <ul class="nav navbar-nav">
+            <li class="active"><a href="https://git.km3net.de/km3py/km3mon/issues">Issues</a></li>
           </ul>
           <ul class="nav navbar-nav navbar-right">
             <li>