Add IMGT VDJ reference to CellRanger Analysis

[ekelley903]

Would it be possible to add an option to run VDJ analysis using the IMGT database as the reference (as opposed to vdj_GRCh38_alts_ensembl-5.0.0, the current reference)? 10X provides a build script for this here: https://support.10xgenomics.com/single-cell-vdj/software/pipelines/latest/advanced/references#header
Thank you!

[PedalheadPHX]

Do you have a feel on the benefit or using this one?