Installation instructions lack python3-setuptools

[muggenhor]

The installation instructions in the README give an aptitude install command to use. Unfortunately they lack the python3-setuptools package. This will not always be a problem because it's a "Recommends" level dependency of python3-pip. Unfortunately this doesn't help if you've configured your system to not install those by default.

So just expanding the package list with that package allowed me to build and install this.

FYI: I'm running Debian Stretch