CMake Nightly Date Stamp
CXXFeatures: add support for XL

Information taken from:
https://www.ibm.com/developerworks/community/blogs/5894415f-be62-4bc0-81c5-3956e82276f3/entry/xlc_compiler_s_c_11_support50?lang=en
Merge topic 'cxx11' into next

a85c500 CXXFeatures: add support for XL
CXXFeatures: clean up test
Merge topic 'cxx11' into next

b5ec5b8 CXXFeatures: clean up test
CXXFeatures: constexpr since g++ 4.6, fix setting CMAKE_CXX_FLAGS
Merge topic 'cxx11' into next

a9aab3c CXXFeatures: constexpr since g++ 4.6, fix setting CMAKE_CXX_FLAGS
VS6: Hardcode id_machine_6 for compiler detection

id_machine6 is never set to an other value than x86. So it is
safe to remove the replacements with "x86" directly.
VS10: Do not set the TargetMachine when detecting the compiler

The Microsoft linker is intelligent enough to detect the target
machine type depending on the input files. This allows us to
get the target architecture from the compiler instead of
maintaining the mapping to the platform name.
VS: Replace ArchitectureId with PlatformName

Since we do not need the information about the target architecture
we can use the PlatformName only to specify the this information.
This also removes setting of the MSVC_*_ARCHITECTURE_ID variable
which is not required, because this variable gets set by the
compiler detection code in CMAKE_DETERMINE_COMPILER_ID_CHECK().
VS12: Remove duplicated overload of UseFolderProperty()

cmGlobalVisualStudio11Generator generator already defines the same
function body, which makes the additional overload useless.
Fix detection of WinCE SDKs with 64bit verion of CMake

Use cmSystemTools::KeyWOW64_32 instead of KeyWOW64_Default to
make sure that the correct part of the registry is read.
VS: Unify how the name of the generator is specified

Use the value of the provided argument instead of using a fixed
character buffer. This aligns VS10+VS11+VS12 with VS8+VS9.
CXXFeatures: add test for delegating constructors
CXXFeatures: remove "test-" from filenames
Merge topic 'cxx11' into next

aa39f87 CXXFeatures: remove "test-" from filenames
5ce08b5 CXXFeatures: add test for delegating constructors
Merge topic 'vs-cleanup' into next

cfd3ea5 VS: Unify how the name of the generator is specified
53fbb76 Fix detection of WinCE SDKs with 64bit verion of CMake
cdb0b69 VS12: Remove duplicated overload of UseFolderProperty()
df8a52d VS: Replace ArchitectureId with PlatformName
28c9a49 VS10: Do not set the TargetMachine when detecting the compiler
bddbf71 VS6: Hardcode id_machine_6 for compiler detection
c034b6e CMake Nightly Date Stamp