Look into showing contigs/coverage in a more intuitive way

[kimleeng]

The contigs in the QC report are represented by numbers currently. I think there's a smart way to show this more as images. With contig lengths sorted by size and heigh to show coverage, coloring could also be done to show species for the contig. This could visually show contamination more clearly as well as plasmids or pcr products (use a log scale for coverage)