ENH: Improved filename/line number reporting in error message.  Macro invocations now chain up the error message.

ENH: Moved ExpandListVariables out of individual commands.  Argument evaluation rules are now very consistent.  Double quotes can always be used to create exactly one argument, regardless of contents inside.

ENH: Improved implementation of MSVC debug hook to only add the hook if DART_TEST_FROM_DART is set in the environment.  This is better than always adding the hook and testing the environment from the callback.

ENH: Added cmSystemTools::EnableMSVCDebugHook() to prevent error dialogs when CMake is invoked by Dart.

ENH: Generate code to setup MSVC debug library hook.  The test driver program will not display error dialogs if DART_TEST_FROM_DART is set in the environment.

- the cmake instance had to be created before accessing the cache (doh)
- the cache iterator was not queried properly (seems the API changed)

Fix bug in globbing. Now it actually uses only files or directories that result in globbing not the ones that were is the vector before