adding fake black texture tests for desktop computer
Use absolute, not relative canvas position when logging errors

checkCanvasRectColor used to log position relative to the corner of the
rectangle being checked. Logging absolute canvas position makes more
sense when analyzing errors, so switch to that in the new and 1.0.2
versions of the conformance suite.
fix some request from Ken Russell about the new test added.
change the bugzilla link directly showing the bug bug fix on Firefox.
Commit partial updates so I can merge upstream changes.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	extensions/index.html
	extensions/proposals/WEBGL_dynamic_texture/index.html
Support for typedefs
Merge branch 'newtypes' of https://github.com/dsheets/WebGL
Updates to conformance rules suggested by Mark Callow. Pulled two paragraphs from the Discussion section up to the Rules section.
Merge pull request #318 from kenrussell/conformance-rules

Updates to conformance rules suggested by Mark Callow. Pulled two paragr...
Fixed problems in reference image generation for GLSL vertex shader tests.

glsl-function-smoothstep-float should use high precision for OpenGL ES
https://www.khronos.org/bugzilla/show_bug.cgi?id=728

For those GLSL function tests which have been migrated to generate reference images in JavaScript, changed the vertex shader variant to use the same geometry for the reference and test shaders. The previous approach of generating the reference image into a texture was incorrect because the two versions used very different interpolation techniques. Thanks to Olli Etuaho from NVIDIA for diagnosing the problem and Chris Green from Imagination for initially raising the issue.

This is a bug fix to the conformance suite, so the fix has been backported as far back as version 1.0.1.
Fixed accidentally-inserted tabs in source files.
Merge pull request #319 from kenrussell/glsl-vertex-shader-tests

Glsl vertex shader tests
Major update, exposing streams and supporting presentation time of video frames.
Merge pull request #320 from msc-hi/master

Major update to WEBGL_dynamic_texture.
[VMC] - Teapot and Framerate counter do not appear on the WebGL+CSS test site on Chrome dev.
https://code.google.com/p/chromium/issues/detail?id=259817

Fixed mismatched uniform precisions between vertex and fragment shaders causing demos to fail to load in Chrome on Windows. The conformance test glsl/misc/shader-with-global-variable-precision-mismatch.html (currently failing on some platforms in Chrome) already covers this case.
Merge pull request #322 from kenrussell/mediump

[VMC] - Teapot and Framerate counter do not appear on the WebGL+CSS test...
Merge pull request #308 from gabadie/change-green-to-blue

adding fake black texture tests for desktop computer
Merge pull request #313 from NVIDIA/report-canvas-position

Use absolute, not relative canvas position when logging errors
Fix interpolation in reference image generation for GLSL fragment shader tests

Emulate the barycentric coordinate interpolation done by the GPU in the
reference renderings for the fragment shader tests. Previously color
values for fragments were computed per-fragment using the bilinearly
interpolated texCoord value, which did not match up with the barycentric
interpolation from the 3 nearest vertices' color values.

This is a bug fix to the conformance suite, so the fix has been
backported as far back as version 1.0.1.