COMP: Fix to get it working with CMake 2.6

Applications/Client/CMakeLists.txt

Applications/CustomServer/Client/CMakeLists.txt

Applications/CustomServer/Server/CMakeLists.txt

Applications/DobranoViz/CMakeLists.txt

CMakeLists.txt

Common/KWCommon/CMakeLists.txt

Plugins/PrismPlugins/Client/CMakeLists.txt

Qt/CMakeLists.txt

Qt/Components/CMakeLists.txt

Qt/Core/CMakeLists.txt

Servers/CMakeLists.txt

Servers/Common/CMakeLists.txt

Servers/Executables/CMakeLists.txt

Servers/ServerManager/CMakeLists.txt

Utilities/VTKClientServer/CMakeLists.txt

Utilities/VTKClientServer/Wrapping/CMakeLists.txt

Utilities/VTKPythonWrapping/CMakeLists.txt

Utilities/Xdmf2

Utilities/hdf5/CMakeLists.txt

VTK