merged from purcell, mac stuff
merged from purcell, mac stuff

YangXin/emacs.d,zuoshifan/emacs.d,zuoshifan/emacs.d,YangXin/emacs.d,zuoshifan/emacs.d,zuoshifan/emacs.d,zuoshifan/emacs.d,zuoshifan/emacs.d,zuoshifan/emacs.d,zuoshifan/emacs.d,zuoshifan/emacs.d