A better option is to have
git installed and with the parent server folder run:
git clone https://github.com/corp-por/core git clone https://github.com/corp-por/stones
An even better option would be to Fork both core and stones, then clone your forks with the previous git clone commands. This allows you to make changes and commit back to your own Fork. Then you can submit a pull request to corp-por and get your commit into the repos we all use!