Revision history for Perl extension Text::TFIDF.

0.01  Tue Oct  4 18:30:28 2011
	- original version
0.02  Sun Feb 19 21:42:00 2012
	- added additional test to ensure a filename and word were passed to the
	  TFIDF method
0.03 Fri Apr 15 21:01:26 2016
	- added Encode calls so that parsing files in other languages/character sets
	  will work
0.04 Tue Ja 16 19:49:09 2018
	- Fixed computation of TF-IDF.  Resources for the equation include http://www.tfidf.com/ and https://en.wikipedia.org/wiki/Tf%E2%80%93idf#Term_frequency%E2%80%93Inverse_document_frequency
	- Updated the tests to reflect the new equation
