Refer to "ISO/IEC 19795-1:2006 "Biometric performance testing and reporting -- Part 1: Principles and framework" in performance evaluation

Following a remark raised after the RP Conference, it would be nice to implement the biometric metrics according to the ISO standard. In particular, it seems that the ROC displayed during the conference was not respecting the definition given in the standard.

One simple option would be to add a reference to the standard in the documentation of the analyzer algorithms.