First pass at ATC conformance test. Embedded texture data is valid.
Removed non-applicable portions of the conformance test, added a couple of additional restrictions ATC enforces.
Removed from old location
Merged https://github.com/KhronosGroup/WebGL/pull/212 to trunk.
Merge pull request #213 from kenrussell/merge

Merged https://github.com/KhronosGroup/WebGL/pull/212 to trunk.
Merge pull request #203 from toji/atc-conformance

WEBGL_compressed_texture_atc conformance test