Spiritus Astrum [P0-B12]: p1525: Towards Early Access

I have made several improvements to the third campaign, as well as fixed several bugs.

In particular, I fixed a bug with the terrain scanning system that was preventing objects from being optimally placed on flat ground.

I have also added new clothing types for the AI, and a way for some NPC types to dynamically change outfits.

There were also other minor issues, some of them longstanding issues, that were fixed.

Finally, I completely retested the first campaign. This has already been extensively tested, and so no new bugs were found, but I did make a note of some improvements that need to be made.

The next step is to make some of these improvements to the first campaign, and then test the second campaign.