Rewrite mania to use the new timing section stuff.

osu.Game.Rulesets.Mania/Timing/ScrollingAlgorithm.cs

@@ -0,0 +1,17 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+namespace osu.Game.Rulesets.Mania.Timing
+{
+    public enum ScrollingAlgorithm
+    {
+        /// <summary>
+        /// Basic scrolling algorithm based on the timing section time. This is the default algorithm.
+        /// </summary>
+        Basic,
+        /// <summary>
+        /// Emulating a form of gravity where hit objects speed up over time.
+        /// </summary>
+        Gravity
+    }
+}