* new/path.jam
(make-NT, make-UNIX): Convert empty path into "."
* new/project.jam
(path-relative-to-project-location): New rule.
* new/stage.jam
(stage-target-class.construct): Use the above rule.
* new/symlink.jam
(symlink-targets.construct): Call 'set-path' on created
virtual targets.
(ln): Attempts at better handling creating symlinks in
directories.
* new/virtual-target.jam
(abstract-file-target.actual-name): If explicit path was
given, include it in grist.
* test/symlink.py: New test.
* test/test_all.py
Run new test.
[SVN r16889]
