contig_taxonomic_assign.py updated

Created by: hoelzer

@mberacochea, @guille0387 did changes to the voting system that we will now also use in the final manuscript version.

I think it's best to merge this into dev and then you can merge this into master (or before into cwl-docker)?

Some of the other branches that are currently open (no-pprmeta, pprmeta-score, no-bitscore-filter) where more for testing purposes and need not be merged (now).

Would be great if we can get a new release at some point! :)

btw: my EBI acc (email) is deactivated so I don't have any access to slack anymore. But please feel free to contact me via email or github issues ;)