zsh: add option to restrict Chromium's cache size
xinitrc: add DISPLAY to the user environment
systemd: add a delay before starting wpa_gui
emacs: update folding.el
awesome: firefox nightly --> aurora
awesome: add a menu to handle the external screen
gtk: change theme again
emacs: magit-gitflow
emacs: update the pylint2 checker definition
emacs: don't load AucTeX at startup