init.el: Modify add-hooks
init.el: Replace add-hook with add-hooks
init.el: Rename add-hook-form to add-hooks-form
init.el: Set ibuffer-mode-hook after load ibuf-ext
init.el: Add setting of yasnippet
init.el: Add setting of faces of auto-complete-mode for yasnippet
init.el: Modify yas-buffer-local-condition