refs #259: Feature: Custom Header

write custom header to layout.html

lib/views/layout/layout.html

@@ -22,6 +22,8 @@
   <link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96">
   <link rel="icon" type="image/png" href="/android-chrome-192x192.png" sizes="192x192">
 
+  {{ customHeader() }}
+
   <!-- polyfills for IE11 -->
   <script>
     var userAgent = window.navigator.userAgent.toLowerCase();