version      date  description
1.0      07/08/10  The first version on CRAN
1.1      07/17/10  Bug fixes
2.0      12/14/10  A major update incorporating the methods proposed by Blair and Imai (2010)
2.1      01/03/11  "lm" method for list experiment linear model added and several bug fixes
2.2      01/19/11  Multi design for "lm" method implemented, several bug fixes
2.3      03/08/11  Plot function for predictions, modified design prediction, and bug fixes
3.0      04/05/11  Prediction and prediction plots for differences in
	proportions and comparison between list and direct survey item predictions; formulae for 	ceiling and floor fits; numerous bug fixes.