PlotOFParallelM(XX,​bycol,xnames)

Plots the trade-off between objective functions as PARALLEL plot

Input Arguments:
XX : matrix [nsamples, ncols] containing the Objective Functions
usually in Multi-Objective Optimization all objectives are
intended for minimization or maximization.
bycol : organize the arrows by which column
xnames : names of the objective functions
Output Arguments:
hh : Figure handle

Additional requirements:
create_colors.m
rescale.m

Notes:
1) Need to think how to show when objectives have LOG scale
2) Need to implement the possibility to use some objectives as
maximization and some as minimization
Example
XX = [1+4*rand(500,1), 3+2*rand(500,1), rand(500,1), -1+2*rand(500,1)];
PlotOFParallelM(XX,2,{'f1','f2','f3','f4'});