Change log:

* Version 0.3.0: July 2013
- Set the ties.method in rank to min for sensitivity and max for specificity and accuracy

* Version 0.2.0: July 2013
- Added the option perc.rank to sensitivity, specificity, and accuracy

* Version 0.1.0: July 2013
- Package submitted to CRAN with functions sensitivity, specificity, accuracy, roc, auc, and plot