More directory refactoring.

Also, the function/method pointer adaptors now cope with void/non-void
return,
  const/non-const methods, and cdecl/fastcall/stdcall calling conventions.

Support for the very-very-soon-to-be-released Pantheios
(http://pantheios.org/). ;-)

Download from http://stlsoft.org/downloads.html#stlsoft_1_9_1b14

You'd be advised to delete the existing directory contents, or extract to a separate directory, as there're a lot of changes.