gitconfig: sort aliases
gitconfig: simple push
zshrc: add qrview()
emacs: show useless whitespace
emacs: save backups in ~/.emacs.d/backups/
zshrc: remove useless colon in comment
zshrc: use emacs or vim depending on $DISPLAY
emacs: disable the menu bar
emacs: enable utf8 and spellchecking in comments/strings