Add configuration placeholders to installer template

Although the zshrc template adds a PATH= string, this is overwritten by the installer script.
This allows it to be placed anywhere in the file instead of having to append at the end.

templates/zshrc.zsh-template

@@ -44,4 +44,21 @@ plugins=(git)
 
 source $ZSH/oh-my-zsh.sh
 
-# Customize to your needs...
+# User configuration
+
+export PATH=$HOME/bin:/usr/local/bin:$PATH
+# export MANPATH="/usr/local/man:$MANPATH"
+
+# # Preferred editor for local and remote sessions
+# if [[ -n $SSH_CONNECTION ]]; then
+#   export EDITOR='vim'
+# else
+#   export EDITOR='mvim'
+# fi
+
+# Compilation flags
+# export ARCHFLAGS="-arch x86_64"
+
+# ssh
+# export SSH_KEY_PATH="~/.ssh/dsa_id"
+