Many updates/fixes to 2018/burton2

This is a big commit but it should complete this entry and 2018 unless I
have missed something.

The make test rule was fixed. A script was not +x.

Renamed freqcount -> freqcount.sh (for browser/display).

Renamed mkkeywords -> mkkeywords.sh (for browser/display).

Renamed runtest -> runtest.sh (for browser/display).

Renamed spotcheck -> spotcheck.sh (for browser/display).

Renamed spotdiff -> spotdiff.sh (for browser/display).

Made tac.man proper man format and renamed tac.1.

Added tokcount.sh - a script that the author included in the remarks but
not in a script.

The renaming of files should be okay including the manifest (it is
believed this is true anyway).

Add try.sh script.

The READ_ME.txt was deleted as it had been renamed to author-README.txt
but the former was never deleted. This file was typo/format checked.

Format/typo check README.md file.

2018/burton2/spotcheck.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+ioc=$1
+: ${iocccsize:=iocccsize}
+: ${ioc:=prog}
+
+opt=-crs
+kopt=-kcrs
+
+for name in $*; do
+	
+	if test $name != $ioc; then
+
+	a=$($ioc $opt < $name 2>&1)
+	b=$($iocccsize $opt < $name 2>&1)
+	if test "$a" != "$b"; then
+		echo $a , $b , $name
+	fi
+
+	a=$($ioc $kopt < $name 2>&1)
+	b=$($iocccsize $kopt < $name 2>&1)
+	if test "$a" != "$b"; then
+		echo $a , $b , $name " keep"
+	fi
+
+	fi
+done