Bukkit

1.6.6:

• Added API

1.6.5:

• Added {BOSSNAME} option to messages in the config to get the bossname properly. (BossName#1 would be displayed as 'Boss Name' to a user)
• Added 'Bomb' ability
• Changed 'Slow' ability into a generic 'Potion' ability which can even target the boss itself
• Added customisable message if a boss uses an ability (configurable for each ability)
• Readded the max spawn level/height option
• Added a cooldown for all abilities
• Made the Lab Viewer message customisable
• Made the message if a boss has a negative health customisable
• Changed the probability option from the chance a mob gets an ability to the chance a boss successfully uses an ability. (Will be readded but probably with a different name)
• Changed deprecated spawnCreature method to spawnEntity
• Fixed Utility.isNear method (which checks if two locations are near each other) to support multiple worlds
• Tiny slimes that split from a medium slime won't become a boss.

1.6.0 (By bm01):

• Added abilities
• Rewrote the boss managing system
• Rewrote config processing