Re-introduced deprecated StorageImplicit.h

The `StorageImplicit.h` header is no longer used. However, just removing
it causes compiles to fail if they include it. To make the transition
better, re-add this file, but cause a deprecation warning if it is
included.

vtkm/cont/CMakeLists.txt

@@ -110,6 +110,7 @@ set(headers
   Serialization.h
   Storage.h
   StorageExtrude.h
+  StorageImplicit.h # Deprecated, rolled into ArrayHandleImplicit.h
   StorageList.h
   StorageListTag.h
   Timer.h

vtkm/cont/StorageImplicit.h

@@ -0,0 +1,29 @@
+//============================================================================
+//  Copyright (c) Kitware, Inc.
+//  All rights reserved.
+//  See LICENSE.txt for details.
+//
+//  This software is distributed WITHOUT ANY WARRANTY; without even
+//  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+//  PURPOSE.  See the above copyright notice for more information.
+//============================================================================
+#ifndef vtk_m_cont_StorageImplicit_h
+#define vtk_m_cont_StorageImplicit_h
+
+#include <vtkm/Deprecated.h>
+#include <vtkm/cont/ArrayHandleImplicit.h>
+
+namespace vtkm
+{
+
+VTKM_DEPRECATED(1.6, "Use ArrayHandleImplicit.h instead of StorageImplicit.h.")
+inline void StorageImplicit_h_deprecated() {}
+
+inline void ActivateStorageImplicit_h_deprecated_warning()
+{
+  StorageImplicit_h_deprecated();
+}
+
+} // namespace vtkm
+
+#endif //vtk_m_cont_StorageImplicit_h