Aktualizacja opisu

An appendix to the v.0.2.0

The front-end didn't change as much as the back-end.
Front-end changes include:
* hint text animation improvements
* a bugfix
* Celestial body selector displays simple info
* Celeatial body generator has now a new option bound to Z key
* Three new buttons were experimentally included in the main UI panel

The second alpha release.

Collision handling was added + some minor improvements

a tiny bugfix. Very much like v0.1.0

The early alpha version