Fixed getQuery and getQueryParameter specs based on feedback from Dean McNamee.

Return type tables were incorrect and man page links were reversed. Fixed the descriptions of both of these methods.
Merge pull request #643 from kenrussell/query-fixes

Fixed getQuery and getQueryParameter specs based on feedback from Dean M...
Removed redundant "count" argument from transformFeedbackVaryings based on feedback from Dean McNamee.

Regenerated webgl2.idl. Updated modification date.
Merge pull request #644 from kenrussell/transform-feedback-varyings-fix

Removed redundant "count" argument from transformFeedbackVaryings based ...
Add supported extension list to WebGL info page
Temporarily checking in copy of tex-image-and-sub-image-2d-with-video into extra/ to see effect of crossOrigin='anonymous'.
Merge pull request #647 from kenrussell/video-texture-test

Temporarily checking in copy of tex-image-and-sub-image-2d-with-video in...
Disable crossOrigin='anonymous' to see effect.
Merge pull request #648 from kenrussell/no-anonymous

Disable crossOrigin='anonymous' to see effect.
Add crossOrigin='anonymous' flag again.
Merge pull request #649 from kenrussell/anonymous-again

Add crossOrigin='anonymous' flag again.
Merge pull request #646 from NVIDIA/webgl-info-extensions

Add supported extension list to WebGL info page
Make insufficient uniform block backing an error in WebGL 2

In GLES3, insufficient backing is allowed to result in GL interruption or
termination. In WebGL, it should be checked.
Merge pull request #652 from NVIDIA/webgl2-uniform-block-size

Make insufficient uniform block backing an error in WebGL 2
Fix typos in extension tests and add #extension directive test

Testing the #extension directive separately makes it more obvious where a
bug in a WEBGL_draw_buffers implementation might be. Firefox currently
seems to be suffering from a bug where WEBGL_draw_buffers is exposed on
all GLES3-capable devices without checking that they support the GLES2
extension. On a careful reading of the GLES3 spec section 4.2.1, it seems
that multiple draw buffers are not supported for GLSL ES 1.0 shaders on
vanilla GLES3, even though multiple draw buffers are otherwise part of
the specification.
Merge pull request #653 from NVIDIA/extension-test-fixes

Fix typos in extension tests and add #extension directive test
Add a test case for shaders with uniforms of unnamed structs.
Merge pull request #654 from zhenyao/struct

Add a test case for shaders with uniforms of unnamed structs.