822: project dep analysis1 , experiment!

remove  LayoutFarm.Drawing  reference
from OpenTK.CoreGraphics
824:remove LayoutFarm.Drawing from OpenTk.Platform
827:remove LayoutFarm.Drawing from OpenTk.PlatformMini
828: rearrange solution folders
829: remove System.Drawing ref
830: remove some references
Merge branch 'dependency_revisit' into v_canvas