Signed-off-by: Stelian Ionescu <sionescu@common-lisp.net>

Signed-off-by: Stelian Ionescu <sionescu@common-lisp.net>

- Three new modules: POSIX (code imported from CL-POSIX aka IOLIB-POSIX
  aka CFFI-UNIX), MACH, and WINDOWS.  Those last two don't have much
  though.
- Port high-level interface to CFFI and using the low-level interface
  defined in OSICAT-POSIX.
- Added new file/pathname utilities adapted from CL-FAD: WALK-DIRECTORY,
  DELETE-DIRECTORY-AND-FILES, DIRECTORY-EXISTS-P, LIST-DIRECTORY,
  FILE-EXISTS-P, DIRECTORY-PATHNAME-P, PATHNAME-AS-DIRECTORY,
  PATHNAME-AS-FILE.
- New: PATHNAME-DIRECTORY-PATHNAME and GET-MONOTONIC-TIME.

way for further fun in that direction.
Fixed some tests.
Prepared things for upcoming 0.5.0 release.

* Die NORMPATH, die!

* Better handling of returned directory entries in WITH-DIRECTORY-ITERATOR. This also let's use be rid of ESCAPE-WILD-NAME which was unportable.
* Incremented version number to 0.4.0 in preparation for release.

 * Fix tests, nicer test-suite.

Moved ffi code away from osicat.lisp, with-c-file now consolidates *default-pathname-defaults* and the os current directory.