665: merge OpenTk.Control to OpenTk.Platforms
667: add LayoutFarm.Drawing projects
668: update LayoutFarm interface
669: fix OpenGL desktop mode
670: move MiniOpenTk to 'external' folder
671: remove OpenTk.MiniPlatforms
Merge branch 'v_layoutfarm.drawing' into v_mini01
Merge branch 'v_mini01'