updated variable paths from old Asus to new Lenovo
changed VGA1 -> VGA-0, and LVDS1 -> LVDS, for new Lenovo
changed Greek -> US as last possible keyboard layout
map windows key to insert since Lenovo laptop has no insert key
added `brightness-dec.sh' and `brightness-inc.sh' for decreasing and increasing brightness, since Lenovo brightness keys do not work
added `brt.sh', which allows setting brightness level
added `wireless.sh', which computes and prints wifi essid and quality; for use with xmobar
added `restore-home.sh' for restoring home directory from backup