Add ModuleWheelsManager for configurable wheel torque settings

Projects/TerraTech/TerraTech/ObjectFieldMultiplier.cs

@@ -323,8 +323,7 @@ namespace TerraTech {
     /// Manages a collection of objects whose fields can be multiplied
     /// </summary>
     /// <typeparam name="T">The type of objects being managed</typeparam>
-    public class MultipliedObjectManager<T>
-        where T : class {
+    public class MultipliedObjectManager<T> {
         private readonly Dictionary<T, MultipliedObject<T>> _managedObjects;
         private readonly Action<MultipliedObject<T>> _configureObject;