dgenome stats: add the unique reaction IDs for pangenome
DB: a better count for pangenome slices
if someone provides a custom pangenome that allows in-paralogs the previous count would have been wrong
DB: reactions copy numbers are no more considered
dgenome stats: a different legend for pangenome and mutants
dape start: no more copy numbers
focus on exclusive reaction IDs: in this way it should be easier to spot genotype/phenotype links
DB: small bugfix
dgenome stats/export, DB: exclusive reaction IDs also for the mutants