Added CMake commands to allow the install of the extlibs on windows.
Updated ctest warning exception regex for VS2010
Bring r19343 from trunk
Tested: windows
Corrected use/name of source folder aliases.
Duplicated FindMPI.cmake so that non-c++ compiler is found first (recommemded commands did not work).
Bring r19325 from trunk
Tested: local linux with mpich