Added Entity Action handling, and A TSneak command that will Toggle Sneak.

MinecraftClient/Commands/Sneak.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace MinecraftClient.Commands
+{
+    public class Sneak : Command
+    {
+        private bool sneaking = false;
+        public override string CMDName { get { return "TSneak"; } }
+        public override string CMDDesc { get { return "Sneak: Toggles sneaking"; } }
+
+        public override string Run(McTcpClient handler, string command, Dictionary<string, object> localVars)
+        {
+            if (sneaking)
+            {
+                var result = handler.sendEntityAction(Protocol.ActionType.StopSneaking);
+                sneaking = false;
+                return  result ? "Success" : "Fail";
+            }
+            else
+            {
+                var result = handler.sendEntityAction(Protocol.ActionType.StartSneaking);
+                sneaking = true;
+                return  result ? "Success" : "Fail";
+            }
+            
+        }
+    }
+}