Same as computeFDRwithID but works with decoy_hit boolean vector.
For more details and references see package vignette
vignette("TargetDecoyFDR_Example", package = "prozor")
list with decoy_hit (indicates if decoy), score the search engine score,
FDR1 false discovery rate estimated using the method of Gygi, SimpleFDR - estimated using the method of Kaell.