[CMake] CMake version check 2.7 versus 2.6.4

[John Drescher]

After trying to go back to the released version of cmake versus the
nightly builds I am getting errors like this:

CMake Error at C:/Program Files/CMake
2.6/share/cmake-2.6/Modules/CMakeImportBuildSettings.cmake:14
(MESSAGE):
  ITK was built using CMake 2.7, but this is CMake2.6.  Please upgrade CMake
  to a more recent version.

Is there any way to avoid this without having to rebuild everything
configured with cmake 2.7?


-- 
John M. Drescher