Adding Swift 3 packages to Xcode 8 using the Swift package manager
<p>I am new to Swift and Xcode. I am running macOS Sierra and Swift 3. </p>

<p>For my first forays in Swift, I am developing a simple command line tool. There are a couple of Swift packages that I want to use and the installation instructions for both packages on GitHub says to use the Swift package manager by simply adding them as dependencies in the package manifest file. </p>

<p>What I can't figure out is how to do this in Xcode. Do I just create a 'package.swift' file in the root of my project? Doing this and then running the project doesn't seem to work as the required packages don't seem to be added to my project. </p>

<p>Am I doing something wrong?</p>