should deblur filter and generate a tree from the same reference?

[antgonza]

Currently SEPP comes with a "global" variable set by the conda install, where Greengenes_13.8 refers to multiple files. This is an intended behavior as we can have other trees: Silva coming soon!!

Anyway, the point is that with this option we could filter all sequences against GG and then build a tree with either GG or Silva.

For reference the current parameters for this 2 options are: "Reference phylogeny for SEPP" & " Positive filtering database"