1.1
    o first version of the package
	
1.2
    o modified R-version constraint, added volcano plot
	
1.3
    o modification to better integrate with the corresponding shiny web application

1.5
    o modification to integrate with the ggplot2 update
	o corrected typos
	
1.6
    o updated plot1gene without resPlot case to have title in the centre after ggplo2 update