Report "unused reads" back to the user

[replikation]

• report back the number of unused reads back to the User.
• Should/Could look like this

nanopore reads:  500,000 reads used from 2,000,000
Illumina reads:  2500,000 reads used from 3,000,000

can be provided as a file in the "unused reads dir" or as a final terminal print

[microbemarsh]

I think it would also be useful to report the .gfa files from the assemblers to view the MAGs with Bandage