Add os.path.supports_unicode_filenames for all platforms,
sys.getwindowsversion() on Windows (new enahanced Tim-proof <wink>
version), and fix test_pep277.py in a few minor ways.
Including doc and NEWS entries.
diff --git a/Lib/posixpath.py b/Lib/posixpath.py
index d5d2621..bf15390 100644
--- a/Lib/posixpath.py
+++ b/Lib/posixpath.py
@@ -17,7 +17,7 @@
            "basename","dirname","commonprefix","getsize","getmtime",
            "getatime","islink","exists","isdir","isfile","ismount",
            "walk","expanduser","expandvars","normpath","abspath",
-           "samefile","sameopenfile","samestat"]
+           "samefile","sameopenfile","samestat","supports_unicode_filenames"]
 
 # Normalize the case of a pathname.  Trivial in Posix, string.lower on Mac.
 # On MS-DOS this may also turn slashes into backslashes; however, other
@@ -409,3 +409,6 @@
             return realpath(newpath)
 
     return filename
+
+supports_unicode_filenames = False
+