1. Fix all PDB calls for Gimp 1.2
	a. airbrush in arrows.c doesn't draw anything, but doesn't give an error
	b. Stroke doesn't work either - it hangs the plug-in
2. Fix arrowgfx and transgfx to be able to undo with single CTRL-z.

Other stuff:
1. Plaid Patterns - pg 107 of Digital Graphic Design text)
2. Zebra Patterns - pg 107 of Digital Graphic Design text)
3. Clean up edges of all patterns - make them tilable?
5. New brushes
	a. 3D square punchout (pg 302 of Digital Graphic Design text)
	b. hooks
	c. more stars
