BUG: Output GenerateCLP arguments on stdout instead of stderr

This will prevent the regular output of the program to be considered
as error by CDash.
Merge branch 'generateclp-output-to-stdout'

* generateclp-output-to-stdout:
  BUG: Output GenerateCLP arguments on stdout instead of stderr
BUG: Allow projects to specify their own list of ITK COMPONENTS. #35

Setting ITK_FOUND to FALSE after calling find_package(ITK COMPONENTS
${components}) will cause CMake to re-run the find_package process with
a new set of COMPONENTS.
Merge pull request #36 from thewtex/find-itk-notfound

BUG: Allow projects to specify their own list of ITK COMPONENTS. #35
BUG: Support parameter file with empty value

This commit fixes Slicer issue 2712

See http://na-mic.org/Mantis/view.php?id=2712
Merge branch 'slicer-issue-2712-support-parameter-file-with-empty-value'

* slicer-issue-2712-support-parameter-file-with-empty-value:
  BUG: Support parameter file with empty value