Revert "Revert workaround for CTK external library dirs"
Revert "Revert workaround for CTK external library dirs"

This reverts commit 0d653d2c0ba97ca142be15287ffe64df6d5beea4.

NifTK/MITK,NifTK/MITK,NifTK/MITK,NifTK/MITK,NifTK/MITK,NifTK/MITK