To install just run the install script:

$ ./install.sh

To get all features working properly make sure you change your terminal font to hack (installed locally by the install.sh).

On iterm2 (OS X) I use Hack 12pt as regular font and Hack 16pt as Non-ASCII fontt (both anti-aliased).

Also make sure you are using xterm-256color as your TERM. You can do that by adding the following line to your ~/.bashrc:

export TERM=xterm-256color