Those are rewritten into Ruby code examples found in various places on the Internet.
The main contributors are Brinkster's PHP-Ming code examples service, RedHot Pepper JP, Peter
Liscovius, Kirupa's and Kumamushi web pages. Every file has it's authorship note. In case if you
are not mentioned here please write to me on pkarwow at fastmail dot fm

Please note, that in order to make some examples to work you have to copy to the destination folder
following files: books.xml, colvar.txt, vars0.txt, vars1.txt, vars2.txt