Pixmap: Fix import of bitmap data.

Custom (1-bit) cursors now actually look correct.

Drawing: Implement GraphicsExposures.

Fixes scrolling in FLTK hanging forever.

Pixmap: Add 16bpp format.

GC: Fix XSetClipMask and enable clipping.

Settings: Further improve DPI handling for GTK.

Fetch the real colorspace for the drawable when creating scratch bitm…

…aps.

Use per-drawable "scratch images" instead of allocating bitmaps for e…

…ach XImage.

This fixes major memory leaks with Cairo Xlib surfaces,
and should constitute something of a performance improvement.

Property: Better unimplemented messages for XDeleteProperty.

Fix pointer-ungrabs.

BView::SetEventMask only clears the mask if both parameters are 0.

Update status.