We actually have to set a proper background color on all our drawins, else the
default black will "flicker through" while the window is drawn.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Lua now has access to a cairo surface via drawin.surface. When the drawing to
this surface is finished, it should call drawin:refresh() to make the result
visible.
Signed-off-by: Uli Schlachter <psychon@znc.in>