Draft: border-screen: Optional border around screen (#63)
Add option to specify border for screen / window in configuration file.
Can be useful when user turn off window decorations and need a subtle hint or want strong window borders.
This MR simply draws to the surface right before it is deployed. Border
is only drawn if setting is set in terminalrc
. It draws over existing
surface - hence any text etc. - but only 1px? wide + uses CAIRO_OPERATOR_ADD
which accumulates layers.
Ref issue #63