Minor bugfixes, introduced a new timing infrastructure and moved DiskController over to it. Minor performance improvements; now running at 110% speed. Display timing is still too slow.

Contralto/Program.cs

@@ -1,13 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-using Contralto.CPU;
-using Contralto.Memory;
-
-namespace Contralto
+namespace Contralto
 {
     class Program
     {