Reduce includes in Serialization header

Source/Engine/Scripting/SoftObjectReference.h

@@ -24,6 +24,7 @@ public:
     Delegate<> Changed;
 
 public:
+    NON_COPYABLE(SoftObjectReferenceBase);
 
     /// <summary>
     /// Initializes a new instance of the <see cref="SoftObjectReferenceBase"/> class.

Source/Engine/Serialization/Serialization.cpp

@@ -23,6 +23,8 @@
 #include "Engine/Core/Math/Matrix.h"
 #include "Engine/Scripting/ManagedSerialization.h"
 #include "Engine/Scripting/ManagedCLR/MUtils.h"
+#include "Engine/Scripting/ScriptingObjectReference.h"
+#include "Engine/Content/Asset.h"
 #include "Engine/Utilities/Encryption.h"
 #if USE_MONO
 #include <ThirdParty/mono-2.0/mono/metadata/object.h>

Source/Engine/Serialization/Serialization.h

@@ -5,15 +5,20 @@
 #include "SerializationFwd.h"
 #include "Engine/Core/Collections/Array.h"
 #include "Engine/Core/Collections/Dictionary.h"
-#include "Engine/Scripting/ScriptingObjectReference.h"
+#include "Engine/Scripting/ScriptingObject.h"
-#include "Engine/Scripting/SoftObjectReference.h"
-#include "Engine/Content/AssetReference.h"
-#include "Engine/Content/WeakAssetReference.h"
 #include "Engine/Utilities/Encryption.h"
 
 struct Version;
 struct VariantType;
 template<typename T>
+class ScriptingObjectReference;
+template<typename T>
+class SoftObjectReference;
+template<typename T>
+class AssetReference;
+template<typename T>
+class WeakAssetReference;
+template<typename T>
 class SoftAssetReference;
 
 // @formatter:off