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.
