Add VRayTriplanarTex Random transform offset options to VRayHDRI

[HowardDay]

It'd be *awesome* if you could add the following options to the VRayHDRI nodes - There's many, many situations I could think of where this would be awesomely handy.

Thanks!

Howie

[HowardDay]

Does this seem likely? I would hope it'd be an easy change.

[HowardDay]

Pinging on this once more.