Installation instructions:
$ mkdir -p ~/.local/bin
$ curl -o ~/.local/bin/text_to_audio.py https://gist.githubusercontent.com/stephane-klein/1406e746f0253956062d4adff7a692bd/raw/8571cdd91cae8ebcd208435daacf431cfc1cd353/text_to_audio.py
$ chmod +x ~/.local/bin/text_to_audio.py