CI useless for perfect ROC curves
Issue a message (decided not go for a warning, as this is purely informational).
Also test AUC == 1 in roc.test and cov
Documenting the new message.
Also making it a warning, as it is specifically not handled properly by the methods (kinda unexpected input).
Make this a warning
Merge branch 'master' into RcppBootstrap
Document new warning in NEWS
Merge branch 'master' into RcppBootstrap