Inconsistency between texImage2D variants #293

1. texImage2D(target, level, internalformat, width, height, border, format, type, pixels) wants pixels as UInt8Array.
2. texImage2D(target, level, internalformat, format, type, pixels) wants pixels as ImageData.

For example:

gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, image.width, image.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, image.data);

I think the second variant of texImage2D should accept ImageData too.