PR into develop branch

PRs should be into the develop branch

Pull Requests (PRs) should be made into the develop branch rather than master. When you create the PR you'll see salcode:master by default but you can change this to salcode:develop

Some Repositories set the Default Branch to develop, which then sets up the correct branch by default (this is something I do on my working projects, e.g. Bootstrap Genesis, but since the focus of this repository is practice, I've not made this change)