Made the ultra berry increase your speed for 10 seconds

It stacks just like in normal bd btw. So if you get 2 ultra berries you
will have the effect for 20 seconds. Also this was surprisingly easy to
add.

Scripts/Globals.cs

@@ -7,6 +7,9 @@ public partial class Globals : Node {
     public static bool VersionChecked = false;
 
     public static float MovementSpeed = 800f;
+    public static float DefaultMovementSpeed = MovementSpeed;
+    public static string ActiveEffect = "none";
+    public static float EffectTimer = 0f;
 
     public static int Score = 0;
     public static int HighScore = 0;