Manual installation

git clone --recurse https://github.com/michael-stief/zsh ~/.local/share/zsh
cp ~/.local/share/zsh/zshenv ~/.zshenv
mkdir -p ~/.config
ln -s ../.local/share/zsh/zshrc ~/.config/.zshrc

Installation script

curl -sL https://raw.github.com/michael-stief/zsh/master/install.sh | bash