620:remove GLES1.0 and  1.1
621: remove GLES1.0 and 1.1
622: add GLES2 test
623: OpenTk.MiniPlatforms ...

Mess up!
624: subpixel rendering err
625: scanline subpix version 1, multi-states

see AADemo_Test3.cs
629: subpix scanline 1 not complete
629.1: subpix scanline 1
631: TypeFacePrinter member modifiers
632: fixed subpix render

still need adjust subpix blending function
633: test subpix, still not correct

need study more!
Merge branch 'v_subpixel_study' into v_fonts
Merge branch 'v_fonts' into v_mini01