Suggestion for the large data download

[LorenaDerezanin]

Hi,
I successfully installed the package with the accompanying data and it worked well on my OS (Linux Manjaro).
Still, as it turns out that the uncompressed data are ~ 600MB large, installing git lfs (Git Large File Storage) before cloning the repository should help to avoid the error message caused by the download of the large files.

I would like to suggest adding these steps to the README:
Install git lfs: sudo apt-get install git-lfs (Debian-based Linux distros)
Set up git lfs: git lfs install

prior to the git clone/ devtools::install step.

Best,
Lorena