Corrected bug causing Habitats to over-build Industrial districts.

Rebalanced support for habitats and rogue servitors.

Added preliminary support for habitats, ring worlds, and ecumenopolises. Sector AI will now build City/Hive/Nexus Districts to add building slots to planets. AI empires will now use construction priorities similar to the sector focus.

Removed Clone Vats (the Gene Modding one, not the Clone Army one) from build priorities. Building upkeep isn't really worth the meager population growth.

Corrected issue allowing the sector to build Industrial Districts when waiting for a city district would be preferred.

Corrected automated cleanup of agriculture districts and causing construction of agriculture districts on empires that don't require them. Corrected bug delaying building of Hive Nodes when above admin capacity.

Expanded support for Destroyers in fleet compositions.

Fixed bugs regarding queuing behavior of some starbase buildings. Altered AI fleet composition to be less vulnerable to exploitation.

Initial compatibility for 3.1.x

Major rework of focus behavior. Loss of AI Building/District behavior as a consequence. AI Building/District behavior to be restored in subsequent patches.

Changes to the Auto Clean Planets policy to prevent some economically destructive looping. Changes should also help the AI in the mid-to-late game with its economy as well.