0.27
	Rename misnamed pacakge variable (harmless).

0.26
	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.