Request: Add TAIR10 to list of genome builds for rbc_mirdeep2_mapper

[jennaj]

toolshed.g2.bx.psu.edu/repos/rnateam/mirdeep2_mapper/rbc_mirdeep2_mapper/2.0.0.8.1

CVMFS has this as a pre-DM "by-hand" build. Maybe explains why missing?

Requested at: https://help.galaxyproject.org/t/mirdeep2-mapper/16457