[ab] Naming of drawing functions

[Luke J Crook]

Justin Heyes-Jones wrote:
> I quite like draw-rect and draw-filled-rect
> 
> or draw-rect with an &optional filled parameter

So something like:

(draw-rect RECTANGLE)
(draw-rect-pp POINT1 POINT2)
(draw-rect-xy x0 y0 x1 x1)

(draw-filled-rect-pp POINT1 POINT2)
(draw-filled-rect-xy x0 y0 x1 x1)

or

(draw-rect RECTANGLE)
(draw-rect-pp POINT1 POINT2)
(draw-rect-xy x0 y0 x1 x1)

(draw-rect-pp POINT1 POINT2 :fill t)
(draw-rect-xy x0 y0 x1 x1 :fill t)

Can't do &optional parameters as these functions take several keyword
args; update-p, clipping-p, color, surface etc.

- Luke