Fixed lots of bugs, improved framerate and pathfinding (again).
Complete list of changes:
-Improved pathfinding a bit.
-Fixed bug where characters sometimes walked through closed doors.
-Fixed bug where party destinations would sometimes not cancel after moving to another map.
-Fixed bug where inventory window wouldn't immediately appear after selecting a party member.
-Setting party destinations is now smoother (collision checks now ignore fellow party members with destinations).
-Attacks now cause retaliation in non-hostile targets even if they miss, and ranged weapons degrade condition.
-Made partyChecks script more efficient (improved framerate).