Added a donation button

NzbDrone.Web/Content/NzbDrone.css

@@ -261,4 +261,10 @@ button span, input[type="button"] span, input[type="submit"] span, input[type="r
 /* Font-Awesome */
 i[class*="icon-"]:not(.gridAction):hover {
     cursor: default;
+}
+
+/* Donate */
+#donate a {
+    background-color: #065EFE;
+    color: #191919;
 }

NzbDrone.Web/Views/Shared/_Layout.cshtml

@@ -30,6 +30,7 @@
             @MvcHtmlString.Create(Html.CurrentControllerLink("Missing", "Index", "Missing"))
             @MvcHtmlString.Create(Html.CurrentControllerLink("Settings", "Index", "Settings"))
             @MvcHtmlString.Create(Html.CurrentControllerLink("Logs", "Index", "Log"))
+            <li id="donate" title="Donate to support the development of NzbDrone"><a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=JLMF78JRUT6TJ" target="_blank">Donate</a></li>
         </ul>
         <input id="localSeriesLookup" type="text" />
     </div>