RJafroc version 2.1.2 is on CRAN!

The need for this release was to fix errors in RJafroc resulting from a recent update of ggplot2.

It also standardizes some the RJafroc functions so as to match my FROC book ; for example,

• RSM_FPF()
• RSM_TPF()
• RSM_NLF()
• RSM_LLF()
• RSM_wLLF()