wrap NMT v2 when available

[davidmeunier79]

https://afni.nimh.nih.gov/pub/dist/doc/htmldoc/nonhuman/macaque_tempatl/template_nmtv2.html#nh-macaque-template-nmtv2

Download:
wget https://afni.nimh.nih.gov/pub/dist/atlases/macaque/nmt/NMT_v2.0_sym.tgz
tar -xvf NMT_v2.0_sym.tgz

[kepkeeloh]

Related to this issue, there is a new 5-tissue segmentation mask that comes with the NMTv2.

We will need to adjust the AtroposN4 node to incorporate this 5-tissue segmentation, and also to output 5 different outputs instead of 3 previously.