0.25
	Cleanup internal documentation.

0.25
	added callback support.
	improved debug messaging.
	fixed bug in delimiter assignment.
	rearranged distribution files.
	improved test script.

0.24
	added sample script and data.

0.23
	fix pseudo-bug relating to 'o' option and regular expressions and token
matching.

0.22
	add push_delimiters method for adding to the delimiter array.

0.21
	add pre_parse and post_parse methods; add minimal debug message support.

0.20
	added multi-token support

0.17
	delimiters() now returns an array of references to the real and the escaped
delimiters. This differs from previous behavior where an array reference
was returned.