Added sponsor button to website

Author: egil

docs/site/templates/bunit/partials/navbar.tmpl.partial

@@ -0,0 +1,25 @@
+{{!Copyright (c) Microsoft. All rights reserved. Licensed under the MIT license. See LICENSE file in the project root for full license information.}}
+
+<nav id="autocollapse" class="navbar navbar-inverse ng-scope" role="navigation">
+  <div class="container">
+    <div class="navbar-header">
+      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar">
+        <span class="sr-only">Toggle navigation</span>
+        <span class="icon-bar"></span>
+        <span class="icon-bar"></span>
+        <span class="icon-bar"></span>
+      </button>
+      {{>partials/logo}}
+    </div>
+    <div class="collapse navbar-collapse" id="navbar">
+      <div id="sponsor-button">
+        <iframe src="https://github.com/sponsors/egil/button" title="Sponsor egil" height="35" width="116" style="border: 0;"></iframe>
+      </div>
+      <form class="navbar-form navbar-right" role="search" id="search">
+        <div class="form-group">
+          <input type="text" class="form-control" id="search-query" placeholder="{{__global.search}}" autocomplete="off">
+        </div>
+      </form>
+    </div>
+  </div>
+</nav>

docs/site/templates/bunit/styles/main.css

@@ -190,4 +190,10 @@ footer small {
 
 .contribution {
   margin-top: 1rem;
+}
+
+#sponsor-button {
+  display: inline-block;
+  padding-top: 10px;
+  padding-left: 20px;
 }