$ pip install storytracker
You won't need it for archival, but the analytical tools explained later one require that you have a supported web browser installed. Firefox will work, but it's recommended that you install PhantomJS, a "headless" browser that runs behind the scenes.
On Ubuntu Linux that's as easy as:
$ sudo apt-get install phantomjs
In Apple's OSX you can use Homebrew to install it like so:
$ brew update && brew install phantomjs