Test basic 3D textures functionality
Test basic 3D textures functionality
Merge branch 'test-3d-textures' of github.com:bjacob/WebGL into test-3d-textures

Conflicts:
	sdk/tests/conformance2/core/tex-storage-and-subimage-3d.html
Merge pull request #748 from bjacob/test-3d-textures

Test basic 3D textures functionality