Update the vtkDICOM remote module tag.

This brings in vtk-dicom 0.7.0

Update the vtkDICOM remote module tag.
This brings in vtk-dicom 0.7.0
aee1663d · David Gobbi · a238d32f · aee1663d
Commit aee1663d authored Oct 22, 2015 by David Gobbi
--- a/Remote/vtkDICOM.remote.cmake
+++ b/Remote/vtkDICOM.remote.cmake
@@ -4,7 +4,7 @@

 vtk_fetch_module(vtkDICOM
  "Dicom classes and utilities"
-  GIT_REPOSITORY https://github.com/lorensen/vtk-dicom
-  # September 3, 2015 - vtksys changes
-  GIT_TAG f4556b282b1f9e3f3adb98a7ad618b0bb57dc6ab
+  GIT_REPOSITORY https://github.com/dgobbi/vtk-dicom
+  # vtk-dicom tag v0.7.0 plus 2 (Oct 23, 2015)
+  GIT_TAG e32ec575b084735b90cfacff589db35ce4cfc017
  )