Add C/Vala API support for the collect_request API
Add C/Vala support for the new CanvasView methods I added earlier today
Collected requests on the GTK side now trigger smaller redraws
Expose the BrushStroke bounding box API.
Add support for the RenderScheduler request-by-rectangle API.
Compile fixes
Vala insists on pass-by-ref for all structs, so.... :/
More CAPI changes made because Vala demands it
Auto-request the bounding-box of new strokes
Force redraw when the viewport is scrolled.
Make the step buttons on scrollers increment by 1px