ENH: Add ModuleParameterGroup::SetParameters.
STYLE: Remove executable bit on GenerateCLPConfig.cmake.in.
DOC: Update the GenerateCLP macro documentation.

Update the comment that the GenerateCLP macro creates
.clp files and remove an unused GenerateCLP.clp file.  This file had been present
since the initial checkin, but .h files are now created, not .clp files.
Merge pull request #1 from thewtex/ParameterSerializerEnhancements2

Parameter serializer enhancements2