Put the plots in a subfolder so they can be more easily ignored

Tests/Test.cs

@@ -173,7 +173,8 @@ public void PlotAll(string Title, Dictionary<Expression, List<double>> Outputs)
                 i.Value.Select((k, n) => new KeyValuePair<double, double>(n, k)).ToArray())
             { Name = i.Key.ToString() }));
 
-            p.Save(Title + ".bmp");
+            System.IO.Directory.CreateDirectory("Plots");
+            p.Save("Plots\\" + Title + ".bmp");
         }
     }
 }