* Actually add descriptions for the boss-related functions into k_boss.h.
* Introduce K_ResetBossInfo, an internal-only function for handling situations where it needs to be cleared.
* Fix a bug where bossinfo wasn't reset when using the map command to go to a battle map after having been in a boss.
* Fix some bugs where you could provide magnitudes out of the desired range to K_InitBossHealthBar and K_UpdateBossHealthBar.
