Replace Oculus controller models

[dmarcos]

We are using touch 1 models (shipped / sold with OG Oculus Rift). We should probably replace them with Touch 2 controllers. Probably not that many OG Rifts in use at the moment. Pinging @msub2 since he's driving all the recent A-Painter work.

[msub2]

For sure. I'll take a look tonight and see if I can update the model to glTF also. In the future it would definitely be cool to support a wider range of controllers, either somewhat dynamically (position tip separately onto a model from A-Frame) or with some community-sourced custom models.

[dmarcos]

Yeah we can expand to more controllers. if we have a separate model for just the tip it will be easy to do.

[msub2]

Think we can close this now that #274 is in