Installing tweego is a little more complicated than (I think) it should be, so here's a script to do it for you. If you'd like to one-line it, you can just cut and paste this in Terminal:
/bin/bash -c "$(curl -fsSL https://gist.githubusercontent.com/jsoma/5ef3045b2004a610455f371479a6f0cf/raw/b6c9224faa18fd52f3e1bf7120af17eed6da8ec1/tweego.sh)"
Once it's installed, tweego docs are here. You'll probably want to read these twee docs, too.
Those download URLs seem to have changed. Easily fixed but thought you might want to know.