Moved ArrayView::SerializationType from public interface into private section

          typename Index = int >

class ArrayView

{

   using SerializationType = Array< Value, Devices::Host, Index >;

public:

   using ValueType = Value;

   using DeviceType = Device;

   using IndexType = Index;

   using HostType = ArrayView< Value, Devices::Host, Index >;

   using CudaType = ArrayView< Value, Devices::Cuda, Index >;

   using SerializationType = Array< Value, Devices::Host, Index >;

   /**

    * \brief Returns type of array view in C++ style.