`virmet covplot` for viruses with a segmented genome

[sschmutz]

Because viruses with a segmented genome share the same ssciname in orgs_list.tsv it's only possible to make a coverage plot of one of the segments.

If one could (alternatively) use stitle for the --organism argument, it would be possible to distinguish between the different segments.

VirMet/src/virmet/covplot.py

Line 53 in 97351c2

criterion = orgs_list.loc[:, 'ssciname'].str.startswith(org_name).fillna(False)

[MaryamZaheri]

We can either replace stitle instead of ssciname for all next runs or I can add a parameter to specify that one would like to use stitle instead of ssciname for the current run.