Translation to Russian

The translation to Russian has completed.
https://github.com/victorivanovspb/aframe-school-ru
https://victorivanovspb.github.io/aframe-school-ru/#/

You may add link into README.md:
```
<a href="https://victorivanovspb.github.io/aframe-school-ru/#/">Русский</a>
```