React 360 - v1.0.0

Re-releasing as React 360, which better reflects the fact that the framework can be used across PC, Mobile, and VR devices at the same time.

React 360 brings with it a number of new features and optimizations, and is designed to simplify UI layout in 3D space. It's already faster than the last version of React VR, and we have more significant optimizations in the pipeline. Learn about the new release in the documentation at https://facebook.github.io/react-360