refactoring to comply with c# conventions

RhythmBullet/Preferences/Controls.cs

@@ -0,0 +1,14 @@
+using Microsoft.Xna.Framework.Input;
+using RhythmBullet.Utilities.Persistence;
+
+namespace RhythmBullet.Preferences
+{
+    public class Controls : Utilities.Persistence.Preferences
+    {
+        public Keys Forward = Keys.Up;
+        public Keys Backward = Keys.Down;
+        public Keys Left = Keys.Left;
+        public Keys Right = Keys.Right;
+        public Keys Shoot = Keys.Space;
+    }
+}

RhythmBullet/Preferences/General.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Xml.Serialization;
+using RhythmBullet.Utilities.DataTypes;
+using RhythmBullet.Utilities.Persistence;
+
+namespace RhythmBullet.Preferences
+{
+    public class General : Utilities.Persistence.Preferences
+    {
+        public Resolution Resolution = new Resolution(1920, 1080);
+        public bool Fullscreen = false;
+        public float MusicVolume = 1f;
+        public float FXVolume = 1f;
+        public string MusicDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyMusic);
+    }
+}