Alpha 12 dev-2647

Bug Fixes

 * Fixed a number of race conditions on load that resulted in engine errors or odd behavior.
 * Fixed ‘Path is not contiguous’ error when the subspace pathfinder is enabled.
 * Fixed ‘item_has_been_looted’ error when trying to restock destroyed items.
 * Fixed ‘try_spawn’ error when raiders are killed trying to leave the area.
 * Fixed engine error when trying to pick up an item from a deleted stockpile.
 * Fixed save/load bugs with postures when saving during panicking, eating, etc.
 * Fixed a bug that prevented other items from being placed when only a single item was blocked.
 * Fixed bug that failed to idle the pathfinder when there was nothing to do.
 * Fixed bug that caused too many hearthlings to work a mining zone.
 * Fixed units stuttering when engaging in combat.
 * Fixed shepherds not always feeding animals
 * Fixed UI error on the promotion window.
 * Fixed ladders not being placed in the wrong orientation against rotated objects.
 * Fixed firepit seats being placed in odd locations when the terrain is not level.
 * Added missing value/buy/sell data for a number of construction and decorative items.
 * The ghost form of the blacksmith’s forge no longer has burning coals.

Other Changes

 * The high performance CPP AI and Subspace Pathfinder are now turned on by default. If you experience bugs, you can disable them in Settings->Gameplay->Experimental.
 * Improved performance when harvesting trees, plants, and boulders.
 * Improved AI performance when building structures.
 * Blacksmiths can now build vaults which hold up to 256 items.