0.07	2020-04-21T20:24:57+0800
	- Add new subroutine: word_iterator
	- Add new subroutine: presuf_iterator
	- Change the calling convention of extract_presuf (backward incompatible)

0.06	2019-06-29T00:45:48+0900
	- Add a new subroutine: sentences_iterator

0.05	2019-04-14T19:33:29+0900
	- Add a new subroutine: tokenize_by_script

0.04	2019-03-22T23:58:44+0900
        - Add a new subroutine: phrase_iterator

0.03	2019-03-16T20:40:36+0900
	- Properly declare 'Test2::V0' as a dependency.
        - Documentation

0.02
	- Add a new subroutine: extract_presuf

0.01
	- utility subroutine: extract_words