Merge pull request #6 from mcveanlab/paper_revisions

Paper revisions

Added copy of the Corticall preprint

Take a graph and unitigs and write a GFA1 file with coverage informat…

…ion that can be viewed in Bandage.

Better logging for Join command

Merge branch 'master' of github.com:mcveanlab/CortexJDK

Former-commit-id: 5198839