Spiritus Astrum [P0-B12]: p1527: Towards Early Access

I am still working on debugging and improvements.

I have made some improvements to the planet generation system, as well as fixed some GUI issues, and improved readability when the background highlight effect is turned on.

I have also added a very simple concept test of a third person camera to the game. It is now possible to view the players character from a third person view.

This actually works quite well, although if I implemented it fully I would need to change a lot of UI elements, aiming, selecting weapons, etc. I doubt that I will add it as a standard feature, but it may be useful for screenshots, or for during conversations, etc.