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.