Added mkinstalldirs to create directories more portably.

diff --git a/tools/install-sh b/tools/install-sh
index 89fc9b0..e9de238 100755
--- a/tools/install-sh
+++ b/tools/install-sh
@@ -1,15 +1,27 @@
-#! /bin/sh
+#!/bin/sh
 #
 # install - install a program, script, or datafile
-# This comes from X11R5.
+# This comes from X11R5 (mit/util/scripts/install.sh).
+#
+# Copyright 1991 by the Massachusetts Institute of Technology
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation, and that the name of M.I.T. not be used in advertising or
+# publicity pertaining to distribution of the software without specific,
+# written prior permission.  M.I.T. makes no representations about the
+# suitability of this software for any purpose.  It is provided "as is"
+# without express or implied warranty.
 #
 # Calling this script install-sh is preferred over install.sh, to prevent
 # `make' implicit rules from creating a file called install from it
 # when there is no Makefile.
 #
 # This script is compatible with the BSD install script, but was written
-# from scratch.
-#
+# from scratch.  It can only install one file at a time, a restriction
+# shared with many OS's install programs.
 
 
 # set DOITPROG to echo to test this script
@@ -29,7 +41,7 @@
 rmprog="${RMPROG-rm}"
 mkdirprog="${MKDIRPROG-mkdir}"
 
-tranformbasename=""
+transformbasename=""
 transform_arg=""
 instcmd="$mvprog"
 chmodcmd="$chmodprog 0755"
@@ -106,6 +118,7 @@
 	
 	if [ -d $dst ]; then
 		instcmd=:
+		chmodcmd=""
 	else
 		instcmd=mkdir
 	fi