FXBuildup

Added in-combat detection.  Sprinting and jumping only drains stamina when you are in combat.

Combat is indicated by crossed swords at the end of the stamina bar.  It means that an enemy is actively targeting you, and can see you.  Break line of sight for long enough, kill the enemy, or get far enough away to leave combat.

There are 2 new configs, one is the amount of time after nothing is targeting you that you are considered out of combat, and the other is the distance away from you that is considered too far to set in combat even if something is targeting you.