Spiritus Astrum [P0-B14]: p1551: Towards Early Access

The NPCAI system has been further tested and improved. I discovered some issues with it on the last run, and I have since fixed several bugs and added some new navigation and local object avoidance features. There is still some work to be done here though.

I have also fixed several other bugs that were discovered during the last run, mostly related to some random generation issues, some more AI improvements, etc.

Finally, I have completed another full retest. The vast majority of the serious bugs appear to be fixed now, and I am running into mostly minor bugs, and areas that need improvement, etc.

Many of the bugs that I discovered on this run have been fixed already, and I should get mostof the rest done next week.