Added support for Silverlight and Mono (And more)

Also added:
* Join, Choice, and Pipe to SmartThreadPool.
* Local performance counters (for Mono, Silverlight, and WindowsCE)

STPSLDemo/Groupbox.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Animation;
+using System.Windows.Shapes;
+
+namespace STPSLDemo
+{
+    public class Groupbox : ContentControl
+    {
+        public Groupbox()
+        {
+            DefaultStyleKey = this.GetType();
+        }
+
+        public static readonly DependencyProperty HeaderProperty =
+            DependencyProperty.Register("Header", typeof(object), typeof(Groupbox), null);
+
+        public object Header
+        {
+            get { return GetValue(HeaderProperty); }
+            set { SetValue(HeaderProperty, value); }
+        }
+
+        public static readonly DependencyProperty HeaderTemplateProperty =
+            DependencyProperty.Register("HeaderTemplate", typeof(DataTemplate), typeof(Groupbox), null);
+
+
+        public DataTemplate HeaderTemplate
+        {
+            get { return (DataTemplate)GetValue(HeaderTemplateProperty); }
+            set { SetValue(HeaderTemplateProperty, value); }
+        }
+    }
+}