Changes

Clean up Switch command code that used to make grown men blush.
 (commit: 0e3374e)

Clean up Equip command.
 (commit: 0fd7d92)

Add Target argument to Spawn command to set a target for the entity to attack. Example usage: - spawn entity:iron_golem target:n@2
 (commit: bbda273)

Make Spawn's Target argument also work on creatures with old AI.
 (commit: 127c663)

Make Health trait use Bukkit health values instead of own internal values now that Bukkit supports setting health higher than 20.
 (commit: 0894f5f)

Add getClosestPlayer() utility. Add <npc.closest.player> tag.
 (commit: af7e644)

Add Player argument to Shoot command, thus allowing entities to be shot by players.
 (commit: 204b393)

Add basic collision detection to Shoot command, thus belatedly almost turning it into a serious command that decent people might use.
 (commit: 710aa41)

Make <npc.health> and <npc.health.max> not require the Health trait.
 (commit: 5b9f053)