Version 0.5: August 2011.
Beta release. Stuff broken.

Version 1.0.0: March 2012
First fully functional release.
Implemented D contrast test.
Implemented R contrast test.

Version 1.0.1: July 2012
Header formats corrected.
Output formats corrected.

Version 1.0.2: Nov 2012
Added log-odds contrast statistic.
Corrected R statistic.