Merge branch 'feature-seqstat_updates' into 'develop'

Feature seqstat updates

Updates on SeqStat (per the commit messages).

We still need to rely on FastQC since some other methods require further testing to be implemented. For example, to get the median base quality from all bases is not that straightforward since the container size may well exceet `Int.MaxValue` while the default containers' maximum sizes are all `Int.MaxValue`.

See merge request !182