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:
curl https://gist.githubusercontent.com/jsoma/5ef3045b2004a610455f371479a6f0cf/raw/bebb34dd808a1703dd37df1fc14fee04685776f2/tweego.sh | bash
Once it's installed, tweego docs are here. You'll probably want to read these twee docs, too.