Add SSH enviornment variables to tmux config.
Merge branch 'master' of github.com:Neal/dotfiles

* 'master' of github.com:Neal/dotfiles:
  Move history and setopt out of config and to their own files.
  Add(/remove(?)) oh-my-zsh plugins and remove unwanted stuff.
  Update tmux config.
  Add more networks to irssi config.
  Add more packages.
  Update oh-my-zsh plugins.
  Don't need line numbers in vim by default.
  Disable oh-my-zsh auto-update.
  Update path.
  Add ghost.sh for ghostbin.com.
  Add tmuxinator plugin.
  Add tss() function.
  Update OS X defaults.