Include transforms from MANC <> JRC2018VNCU/M/F

[eichlerkathi]

Here are John's bridging registrations:

MANC to JRC2018VNCM https://figshare.com/s/7f003353c24741136df3

JRC2018VNCM <> JRC2018VNCU https://figshare.com/s/42ad71eb14e7dd51e81a

RC2018VNCF <> JRC2018VNCU https://figshare.com/s/c4589cef9180e1dd4ee1

[jefferis]

Thanks @eichlerkathi. @dokato maybe we could refactor nat.jrcbrains::download_saalfeldlab_registrations()

https://github.com/natverse/nat.jrcbrains/blob/master/R/saalfeld_reg.R#L36

to allow a vector of additional files / registration names to be provided?

[jefferis]

Then we could provide a function in the malevnc package to download those files. They're pretty big so I wouldn't necessarily want them to be part of the default bundle.

[jefferis]

I'll do the nat.templatebrains bit if you wouldn't mind doing the malevnc bit @dokato

[dokato]

@jefferis sure!

PS @eichlerkathi the first figshare link doesn't work:

{"message": "Entity not found: file", "code": "EntityNotFound"}