DESCRIPTION:

This struct contains several variables that contain values
that are used to compensate for window system peculiarities:
- border.x/y (int) contains an extra border placed between
  relating windows. This should be the sum of the window system
  boder sizes (left+right and top+bottom respectively) for
  seamless window placement.
- offset.x/y (int) is added when placing windows to compensate
  for different window systems which count or don't count the
  border when placing and different border widths.