argument that allows user to colour crude/adjusted sequence ratios that are > 1 for plotSequenceRatios.

[daniellenewby]

For the plotSequenceRatios it would be useful to have a function that when turned specified it colours sequence ratios > 1 (i.e the lower sr is > 1) and the rest are a greyed out colour. This will help highlight which ones are positive signals when testing alot of index-marker combinations.

[KimLopezGuell]

I can do it @daniellenewby