Request to change permissions requirements

As described in https://github.com/deepmind/alphafold#genetic-databases:

> **NOTE: If the download directory and datasets don't have full read and write permissions, it can cause errors with the MSA tools, with opaque (external) error messages. Please ensure the required permissions are applied, e.g. with the sudo chmod 755 --recursive "$DOWNLOAD_DIR" command.**

For multi-user environments, where it is best to have reference sets shared, static, and locked down, would it be possible to allow the permissions to be root owned and 755, rather than users needing write permissions? Requiring every user to have a copy of the reference set owned by them, writable, and on fast SSD just does not scale.

Cheers