Fonts in the configuration may now be a comma separated list of
fonts (all using the fontconfig format). The first font is the primary
font, and the rest are fallback fonts that will be searched, in order.
This allows you to configure the width of each side of the border
individually. border.width can still be used, and will set all four
borders to the same width.
Closes#77
This is an integer that specifies the amount of scrolling that needs
to be accumulated before a wheel-up/down event is emitted.
A higher value means you need to drag your fingers a longer distance
before the event is emitted.
The default is 30.
