Pull request for development

plotMatrix.R added into R folder

TabFiles added into extdata - here I'll put vaious tab files to be able to show off readGeneric

still have to sort out the documentation shit stuff

R cmd check was giving warning about the ggplot plotting, when x=X1 and y=Y1, because he said
that he couldn't find the X1 and Y1 variables, so I quoted them, but that can be removed