The module implements a fast and small object oriented way of
processing any kind of html/sgml/xml files by tag.

The getbytoken(0) is similar to while(<>) but instead of reading lines
it reads tags or tags and text.

HTML::TagReader makes it easy to keep track of the line number in a file
even though you are not reading the file by line. This important if you
want to implement error messages about html errors in your code.