Reticle / Gaze implementation

[Zulban]

When you look at a game object with a VisionTracker script attached to it, a reticle appears. If you keep looking at it, the reticle grows or shows progress in some way. It does this by accessing the values from the public functions in VisionTracker.

Don't worry about making anything happen to the object you are viewing. That should be a separate script/issue anyway.

Note: do not make repeated calls to GetComponent every frame. It is (or at least used to be) rather slow.

[peterwilkinson]

Reticle Working, just need to access some of the methods for it and we're in business.