72: explore agg core
74: focus on RGBA color actor

choose appropriate ctor at compile time
80: refactor
81
82:  NativeBufferMan
83: rearrange
84: arrange code ...
85: errors
86: errs
95: fix StackBlur v1

need performance improvement
96: ImageBufferHelper

move some code from ImageBuffer to ImageBufferHelper
104: retro ArrayPOD
Merge branch 'errs' into v_core1.2
105:
Merge branch 'v_core1.2' into v_mini01