Disable Tracking module for iOS and NETFX. (It depends on DNN in 3.2 release)

Emgu.CV.Contrib/Tracking/MultiTracker.cs

@@ -2,6 +2,8 @@
 //  Copyright (C) 2004-2017 by EMGU Corporation. All rights reserved.       
 //----------------------------------------------------------------------------
 
+#if !(__IOS__ || UNITY_IPHONE || NETFX_CORE)
+
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -98,4 +100,6 @@ namespace Emgu.CV
       [DllImport(CvInvoke.ExternLibrary, CallingConvention = CvInvoke.CvCallingConvention)]
       internal static extern void cveMultiTrackerRelease(ref IntPtr tracker);
    }
-}
+}
+
+#endif

Emgu.CV.Contrib/Tracking/Tracker.cs

@@ -2,6 +2,8 @@
 //  Copyright (C) 2004-2017 by EMGU Corporation. All rights reserved.       
 //----------------------------------------------------------------------------
 
+#if !(__IOS__ || UNITY_IPHONE || NETFX_CORE)
+
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -83,4 +85,6 @@ namespace Emgu.CV
       [DllImport(CvInvoke.ExternLibrary, CallingConvention = CvInvoke.CvCallingConvention)]
       internal static extern void cveTrackerRelease(ref IntPtr tracker);
    }
-}
+}
+
+#endif