7890: try MiniAgg
7899: LayoutFarm.ClientPlatforms not need LayoutFarm.Drawing

dependency analysis, move files
7900: remove UIEventArgs.OffsetCanvasOrigin(Point p)
Merge branch 'v_miniAgg' into v_dev
7901: move IUpdateStateChangedListener to Composers
7904: add MiniAgg Source, rearrange files
Merge branch 'v_miniAgg' into v_dev
Merge branch 'v_dev'