[darcs2hg] Windows compatibilty patct

Originally submitted by Daiju Kito
 1. single quote didn't work in several cases
 2. os.unlink tries to delete tmpfile when it's called. It won't wait like unix.

contrib/darcs2hg.py

@@ -92,7 +92,7 b' def darcs_tip(darcs_repo):'
 
 def darcs_pull(hg_repo, darcs_repo, chash):
 	old_tip = darcs_tip(darcs_repo)
-	res     = cmd("darcs pull '%s' --all --match='hash %s'" % (darcs_repo, chash), hg_repo)
+	res     = cmd("darcs pull \"%s\" --all --match=\"hash %s\"" % (darcs_repo, chash), hg_repo)
 	print res
 	new_tip = darcs_tip(darcs_repo)
 	if not new_tip != old_tip + 1:
@@ -110,7 +110,8 b' def hg_commit( hg_repo, text, author, da'
 	old_tip = hg_tip(hg_repo)
 	cmd("hg add -X _darcs", hg_repo)
 	cmd("hg remove -X _darcs --after", hg_repo)
-	res = cmd("hg commit -l %s -u '%s' -d '%s 0'"  % (tmpfile, author, date), hg_repo)
+	res = cmd("hg commit -l %s -u \"%s\" -d \"%s 0\""  % (tmpfile, author, date), hg_repo)
+	os.close(fd)
 	os.unlink(tmpfile)
 	new_tip = hg_tip(hg_repo)
 	if not new_tip == old_tip + 1:
@@ -156,7 +157,7 b' if __name__ == "__main__":'
 		print "Given HG repository must not exist when no SKIP is specified."
 		sys.exit(-1)
 	if skip == None:
-		cmd("hg init '%s'" % (hg_repo))
+		cmd("hg init \"%s\"" % (hg_repo))
 		cmd("darcs initialize", hg_repo)
 	# Get the changes from the Darcs repository
 	change_number = 0