Added function OrderCloseAll to mtapi4

MtApi/MtApiClient.cs

@@ -303,6 +303,10 @@ namespace MtApi
             return (TradeOperation) retVal;
         }
 
+        public bool OrderCloseAll()
+        {
+            return sendCommand<bool>(MtCommandType.OrderCloseAll, null);
+        }
         #endregion
 
         #region Check Status

MtApi/MtCommandType.cs

@@ -181,6 +181,7 @@ namespace MtApi
         iTimeArray                          = 149,
 
         //
-        RefreshRates                        = 150
+        RefreshRates                        = 150,
+        OrderCloseAll                       = 151
     }
 }

MtApi/Properties/AssemblyInfo.cs

@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.16.0")]
-[assembly: AssemblyFileVersion("1.0.16.0")]
+[assembly: AssemblyVersion("1.0.17.0")]
+[assembly: AssemblyFileVersion("1.0.17.0")]