Added basic loading screen and test case

osu.Game/Screens/Play/LoadingScreen.cs

@@ -0,0 +1,37 @@
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Primitives;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Screens;
+using osu.Game.Beatmaps;
+using osu.Game.Database;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Screens.Backgrounds;
+using osu.Game.Screens.Menu;
+using OpenTK;
+
+namespace osu.Game.Screens.Play
+{
+    public class LoadingScreen : OsuScreen
+    {
+
+        private string loadingText = "loading...";
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Add(
+                new OsuSpriteText
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Text = loadingText,
+                    TextSize = 48,
+                    Font = @"Exo2.0-MediumItalic"
+                }
+            );
+        }
+    }
+}