Integrate NCBI tax tool in screening

[hyphaltip]

https://github.com/ncbi/ngs-tools/tree/tax/tools/tax tool provides way to screen for contamination in reads or contigs before processing

[hyphaltip]

large scale database install needed to replicate NCBI process, unclear at this point if it is that superior to sourpurge and the vecscreen logic already - there are small instances that appear when submitting genomes but it isn't clear this is useful overhead for this tool as full install of NCBI resources are very large and require dedicated machine with high memory.

[hyphaltip]

Add FCS-adaptor to vecscreen step -- https://github.com/ncbi/fcs/wiki/FCS-adaptor