Installing brew and oh-my-zsh

[heathflohre]

These have been a great help in starting my own dotfiles. Following the Mac setup, looking at brew.sh in particular, Iine 4 says "Installing Homebrew.", but I don't see the ruby install script. It seems to be located on line 17 of install-zsh.sh, but the instructions say to run that after setup.sh. And the call to install oh-my-zsh only seems to run if it's on a Linux machine, not a Mac. And are you using the installed zsh shell on the Mac? There doesn't seem to be a call to install it on a Mac either. Just want to be clear before running it on my machine. Thanks for the help.