Gfx: Now uses Graphics2D exclusively.  Added AA push/pop.
Gfx: Added push/pop for transform
Gfx: drawGrid now generates much less garbage
drawGrid now disables AA when not required at high zoom levels
Geo: Removed sqerp()
Geo: Added coordinate system description
Gfx: drawCircle now uses a much nicer looking draw method
Region: Added 8-way directional getters
Added VecPath class
Gfx: Added stroke style stack
EditorPanel: Added AND gate drawing test