* Added BORLAND target to several CMakeLists.txt.
(MSVC and BORLAND require similar behaviour for imports/exports)
* Added __BORLAND__ ifdefs where needed.
* Selected correct PROTO define for __MSVC__.
* Renamed static function min to minimum to prevent conflict in MSVC.
* Added condition __MSVC__ when __attribute( ( unused ) ) was used.
* Added {} in classes.c to prevent local variable definitions which
are not allowed in MSVC for c files.
* Added xgetopt.cc/xgetopt.h for getopt functionality.
* Added SCL_EXPRESS_DLL_IMPORTS/SCL_EXPPP_DLL_IMPORTS to CMakeLists.txt.
* Renamed __in to __i in LISTdo_links macro because __in is a reserved macro for MSVC.
* Renamed isascii to __isascii for MSVC.
* Added __MSVC__ to compiler flags and use it.
* Made unistd.h include conditional by cmake HAVE_UNISTD_H flag.
* Made dirent.h include conditional by cmake HAVE_DIRENT_H flag.
* Made sys/params.h include conditional by cmake HAVE_SYS_PARAMS_H flag.
* Made stdbool.h include conditinal by cmake HAVE_STDBOOL_H flag.
* Added scl_stdbool.h as an alternative for stdbool.h.
* Added xgetopt.cc/xgetopt.h to be included when HAVE_GETOPT flag false.
