Add VR Controller Support

[mtwoodard]

There are a few tasks to be done for the VR controllers.

• Track controllers and pass info to shader

• Attach light objects to controllers

• Add simple flight controls in order to move around the scene

• Allow for different types of controllers (i.e. Vive, Oculus, etc.)

• Control brightness and hue from controller

• Add Ellipsoid like shapes for the controller body

[mtwoodard]

Found this helpful guide to the script that we'll be using https://www.npmjs.com/package/three-vive-controller, the npm stuff can just be disregarded.

[mtwoodard]

On further research I found a better basis for VR Controller here. This will allow for different platforms than just the Vive.

[mtwoodard]

You should now be able to fly in the direction you are looking by holding done the primary controller button (e.g. the trigger on the vive controller).