Upgrade to less version 403.

Upgrade to less version 403.

These are the differences between version 394 and version 403:

-Allow decimal point in number for % (percent) command.
-Allow decimal point in number for -j option (fraction of screen height).
-Make n command fetch previous pattern from history file on first search.
-Don't rewrite history file if it has not changed.
-Don't move to bottom of screen on first page.
-Don't output extraneous newlines, so copy & pasting lines from the output
works better.
-The -c option has been made identical with the -C option.
-Allow "/dev/null" as synomym for "-" in LESSHISTFILE to indicate that no
history file should be used.
-Better compatibility with POSIX more specification.
-Make -f work for directories.
-Make "t" cmd traverse tags in the correct order.
-Allow a few binary characters in the input file before warning that the
file is binary.
-Don't warn that file is binary if it merely contains ANSI color sequences
and -R is in effect.
-Update Unicode character tables.
-Fix bug when filename contains certain shell metacharacters such as "$".
-Fix bug when resizing the window while waiting for input from a pipe.