Log Message:
Update to 0.2.1:
- documentation fixes
- display-directx:
  - bugfix: do not adjust the window with the size of the
    decorations. Windows no longer get bigger on each and every move.
  - bugfix: make `ggiWmhGetPos(3)` and `ggiWmhGetSize(3)` return
    values consistent with any previous calls to `ggi WmhMove(3)`
    and `ggiWmhResize(3)`.
  - change coords of `ggiWmhGetPos(3)` and `ggiWmhMove(3)` to
    behave as on display-x