tests/test-dirstatedirs.out

setup.py: subprocess instead of os.popen, sys.stderr.write instead of print

Also check that .hg is a directory.

adding a/b/c/d/x
adding a/b/c/d/y
adding a/b/c/d/z
moving a/b/c/d/x to z/b/c/d/x
moving a/b/c/d/y to z/b/c/d/y
moving a/b/c/d/z to z/b/c/d/z