Check WebGL compatibility

[BenjaminDRichards]

Under very rare circumstances, WebGL will break. Thus far we've only had one report of this, in the comment chain:

http://www.kiwijs.org/documentation/tutorials/creating-a-basic-kiwi-js-game/#comment-88863

In summary, the GLTextureWrapper seems to be failing. It may be creating texture data, but the wrapper object itself is failing to exist. We don't know why.

We do know that three.js examples work fine for this user. Does this mean it's a WebGL compatibility issue? Or is the wrapper bugging out under very specific circumstances? Or is there just an old version of KiwiJS somewhere in the ecosystem?