moved Log, Stopwatch to FileFormats. Added Support/Timer.

OpenRa.FileFormats/Support/Timer.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OpenRa.Support
+{
+	public static class Timer
+	{
+		static Stopwatch sw = new Stopwatch();
+		static double lastTime = 0;
+
+		public static void Time( string message )
+		{
+			var time = sw.ElapsedTime();
+			Log.Write( message, time - lastTime );
+			lastTime = time;
+		}
+	}
+}