Installation details in README.md

[spinicist]

Hello,

Thanks for gathering all these atlases in one place. It's very handy.

I naively attempted to download the atlases via the "Download as Zip" button on Github. This doesn't work due to the use of git-lfs. Perhaps the README.md should start with details of how to obtain the atlases via git clone and explain why?

Also, at the end of cloning, my version of git-lfs reported that two files "were not pointers, but should have been".

[ofgulban]

I totally agree with @spinicist , had the same issue. Having a "how to download atlases" section in the readme would reduce confusion (e.g. see #35, #36 ).