~/.emacs.d: sync updated files automatically

e.g. update the buffer with the new content when they're changed on
disk.

.emacs.d/init.el

(add-to-list 'auto-mode-alist '("\\.pxi\\'" . pixie-mode))
(custom-set-variables
 '(global-auto-revert-mode t)
 '(initial-buffer-choice (get-buffer "*scratch*"))
 '(haskell-mode-hook '(turn-on-haskell-simple-indent)))