plotROC 1.3
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  * Added tests
  * Fixed vignette
  * Allow arbitrary class labels
  * Cleanup after interactive plot creation
  * Citation information

plotROC 1.2
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  * New feature: click on interactive plot to display confidence region

plotROC 1.1
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  * New feature: Support for multiple curves

 plotROC 1.0
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  * Initial release
