add about page to help section

MediaBrowser.WebDashboard/Html/scripts/aboutPage.js

@@ -0,0 +1,24 @@
+var AboutPage = {
+
+    onPageShow: function () {
+        AboutPage.pollForInfo();
+    },
+
+
+    pollForInfo: function () {
+        $.getJSON("dashboardInfo").done(AboutPage.renderInfo);
+    },
+
+    renderInfo: function (dashboardInfo) {
+        AboutPage.renderSystemInfo(dashboardInfo);
+    },
+
+
+    renderSystemInfo: function (dashboardInfo) {
+        var page = $.mobile.activePage;
+        $('#appVersionNumber', page).html(dashboardInfo.SystemInfo.Version);
+    },
+
+};
+
+$(document).on('pageshow', "#aboutPage", AboutPage.onPageShow);