Install ncbi-blast+ during setup

[TransGirlCodes]

Ncbi-blast+ is a very common set of command line utilities for Bioinformatics, BioJulia's BioTools.jl requires this command line tool, other packages written by biologists may well want this too if they invoke blast from the julia shell interface.

[IainNZ]

Why does BioTools not install this during installation already? How big/complicated is this package?

[TransGirlCodes]

I'm not sure I recall why not because this was a little while ago, but I suppose the suggested way to do this now is with https://github.com/JuliaPackaging/BinaryProvider.jl ?

[IainNZ]

I'm a bit out of the loop myself, but I'd suggest that that possibility should ideally be fully explored before going down the path of adding exceptions here.