Spatial Anchors!

This update adds two huge features

1. Spatial Anchors: When you take your headset on and off, or recalibrate your play area, the objects stay fixed in place! Next up I want to make them stay put in a save load cycle too.

2. World Mover: The edit button now make a world object that lets you move and scale all objects at once, this should help with any issues after loading in a new scene.