battery update period: 1s → 10s
rio allows smaller windows, update the logic
horizontally centered too (thanks jmi2k)
fix vertical resizing
do not redraw on every event
update readme
update screenshot
use box drawings light vertical instead of |
simplify, make battery status appear on the left or right depending on the corner
fix window sizing depending on the font; use tmdate(2)
use Borderwidth
add license