Support .gbk / .gbff [.gz] files

[tseemann]

It would be great if --add-to-library could support .gbk/.gbff (and .gz versions thereof).

These have the taxid in taxon:NNN field in the source tag.

To make it fast you can avoid parsing the Genbank file, and just read it as follows:

https://raw.githubusercontent.com/MDU-PHL/mdu-tools/master/bin/genbank-to-kraken_fasta.pl

[dfornika]

@tseemann

I've incorporated this suggestion into a branch of my fork:

https://github.com/dfornika/kraken/tree/add-to-library-gb

Do you have any suggestions on how this could be improved before I create a pull request?

[tseemann]

@dfornika I've commented on your fork commit with some things.

[dfornika]

@tseemann The pull request was merged so I think this issue can be closed

[tseemann]

@dfornika yep thx!