plotCNOlist2:
Another version of plotCNOlist that allows to plot 2 cnolist in the same layout
to compare them. This function uses ggplot2 library. It is recommended for small
data sets (about 15 species).
Description
This function plots the data in a CNOlist as a matrix of plots with a row for
each condition and a column for each signal, Cues are simply represented by a
number.