134: refactor images
135: fix RectangleInt coordinate
137: refactor
138
139: pixel interpolation

this is not optimized version
140: test pixel rotation
140:  ChildImage

change ReferenceImage to ChildImage (like OpenVG)
142: move code
Merge branch 'v_images' into v_core1.2
143: refactor
144: simplify span iter

note that first index start at 1
145: refactor IScanline Interface
146: refactor
Merge branch 'v_scanline' into v_core1.2
Merge branch 'v_core1.2' into v_mini01