too many plugins = slow init warning

templates/zshrc.zsh-template

@@ -44,6 +44,7 @@ ZSH_THEME="robbyrussell"
 # Which plugins would you like to load? (plugins can be found in ~/.oh-my-zsh/plugins/*)
 # Custom plugins may be added to ~/.oh-my-zsh/custom/plugins/
 # Example format: plugins=(rails git textmate ruby lighthouse)
+# Add wisely, as too many plugins slow down shell startup.
 plugins=(git)
 
 source $ZSH/oh-my-zsh.sh