Additional to https://github.com/JJ/Test-Text/issues/
[ ] Have optional interface to show only number of words and errors.
[x] Eliminate File::Slurp dependencies to get done with CPAN bug
[x] Add single-function interface
[ ] Check for other languages (non-English, non-Spanish)
[x] Write short HOWTO for those who want to use it for continuous
integration of their novels.
[x] Write a real README file.
[ ] Make possible several text directories.
[x] Count words and sentences.
[ ] Have proper Markdown, text and org support.