Add sidebar navigation, logo

lib/main.dart

@@ -11,7 +11,7 @@ class RostremApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter Demo',
+      title: 'Rostrem',
       theme: ThemeData(
         // This is the theme of your application.
         //
@@ -22,7 +22,7 @@ class RostremApp extends StatelessWidget {
         // or simply save your changes to "hot reload" in a Flutter IDE).
         // Notice that the counter didn't reset back to zero; the application
         // is not restarted.
-        primarySwatch: Colors.blue,
+        primarySwatch: Colors.red,
       ),
       home: const RosterHomePage(),
     );