Add onerror handling for img/video loading.
Updates
Matrix Attribute Test

Add a conformance test that verifies matrix attribute locations do not clash with other shader attributes, regardless of their position in the attribute list.
Address feedback from Ken

- Alphabetically sorted 00_test_list.txt
- Replaced finishTest() with 'var successfullyParsed = true;'
Merge pull request #691 from RafaelCintron/matrixAttributes

Matrix Attribute Test
Remove onload arg from makeVideo.
Merge pull request #689 from zhenyao/onerror

Add onerror handling for img/video loading.
Refactored duplicated reportResults function and improved logging on failures. Thanks to hartmanng@chromium.org for pointing this out.
Merge pull request #692 from kenrussell/better-error-logging

Refactored duplicated reportResults function and improved logging on fai...
Fill in the spec for most texture functions in WebGL 2

Adds TEXTURE_IMMUTABLE_* enums to GetTexParameter which were previously
missing, and adds a note about TexImage3D being removed. Some parts like
format restrictions still need some work.
Added missing semicolon

As pointed out in #694.
Merge pull request #693 from NVIDIA/webgl2-texture-spec

Fill in the spec for most texture functions in WebGL 2