Add absolute classification numbers to the report

[hoelzer]

The new report is great!

One thing: to directly see the amount of reads that account to SC2 or human (in particular for a negative control) it would be great to add these numbers instead/ in addition to the percentage values. 100 % SC2 in a negative control sounds worrying but then the user anyway has to look into the kraken classification/ krona plot to see that these are maybe only a handful (false positive) reads.

It would be then important though, to take care of large numbers and format them in a nice way (e.g. 1k 1m 1g) to not spoil the nice table view.