Fixup README

This is now consistent with ubase.  The advantage is that it can
be generated very easily with:

for i in $(./sbase-box); do echo $i; done

README

@@ -6,13 +6,76 @@ across UNIX and UNIX-like systems.
 
 The following programs are currently implemented:
 
-    basename cal  cat chgrp chmod chown  chroot cksum cmp comm  cp cut
+basename
-    date dirname du  echo env expand false fold grep  head hostname id
+cal
-    kill ln  ls mc md5sum mkdir  mkfifo mktemp mv nice  nl nohup paste
+cat
-    printenv  pwd readlink  renice rm  rmdir sleep  setsid sort  split
+chgrp
-    sponge strings sync  tail tar tee test touch tr  true tty uudecode
+chmod
-    uuencode  uname   unexpand  uniq  unlink  seq   sha1sum  sha256sum
+chown
-    sha512sum wc xargs yes
+chroot
+cksum
+cmp
+cols
+comm
+cp
+cut
+date
+dirname
+du
+echo
+env
+expand
+false
+fold
+grep
+head
+hostname
+kill
+ln
+ls
+md5sum
+mkdir
+mkfifo
+mktemp
+mv
+nice
+nl
+nohup
+paste
+printenv
+pwd
+readlink
+renice
+rm
+rmdir
+sleep
+setsid
+sort
+split
+sponge
+strings
+sync
+tail
+tar
+tee
+test
+touch
+tr
+true
+tty
+uudecode
+uuencode
+uname
+unexpand
+uniq
+unlink
+seq
+sha1sum
+sha256sum
+sha512sum
+wc
+xargs
+yes
 
 sbase is mostly following POSIX but we deviate wherever we think it is
 appropriate.