471: MiniAgg.HardwareGraphics
474: remove System.Drawing from OpenTk

use LayoutFarm.Drawing
not complete, build success only OpenTk.CoreGraphics
478: build pass OpenTk.Platform, GLControl
479: fix OpenTkEssTest
Merge branch 'v_hw' into v_mini01
482: prepare some openTK demo
483: T24_FormMultipleGLControlsFormDemo2
484: TestGLCanvas

Experiment
489: Tessalation
490: CanvasGL2d

just refactor
490.1
491:
493: GLBitmapTexture
494: update OpenGLControl Coordinate
496: DrawEllipse
498: GLScanline, Experiment!
499: Agg Scanline methods meets OpenGL!
501: DrawPoint
502: StrokeWidth
504: CanvasSmoothMode