Spiritus Astrum [P0-B13]: p1539: Towards Early Access

I have completed more testing and debugging, mostly related to the campaigns.

I have also added more features to the capital ship interiors, and fixed some bugs that I discovered, as well as improved the story triggers slightly.

Finally, I have made some improvements to the campaign missions themselves.

The next step is to do another complete retest of the story campaigns.

I have also uploaded some short videos to youtube. They are mostly random exploration videos taken during the story campaigns.