Decent antigen/zshrc setup

.zshrc

source /usr/local/antigen/antigen.zsh
# Load the oh-my-zsh's library.
antigen use oh-my-zsh

# Bundles from the default repo (robbyrussell's oh-my-zsh).
antigen bundle command-not-found

# Syntax highlighting bundle.
antigen bundle zsh-users/zsh-syntax-highlighting

# ZSH port of Fish shell's history search feature.
antigen bundle zsh-users/zsh-history-substring-search

# Load the theme.
antigen theme steeef

# Tell antigen that you're done.
antigen apply