First, download robo and move it to the correct directory
1. `curl -o robo.phar http://robo.li/robo.phar`
2. `chmod +x robo.phar && sudo mv robo.phar /usr/local/bin/robo`
Next, add an alias to your .bash_profile so you can just use `robo`
1. `open ~/.bash_profile`
2. Paste in `alias robo='/usr/local/bin/robo.phar'`
3. Save and close
4. `source ~/.bash_profile`
To update robo, use the command `robo self:update`