Updated some more events

Rewrote the following events to use the new Messages:
* AsyncPlayerChatEvent
* AsyncPlayerPreLoginEvent
* PlayerDeathEvent
* PlayerLoginEvent
* ServerListPingEvent

Improved the implementation in:
* PlayerJoinEvent
* PlayerKickEvent
* PlayerQuitEvent

Added javadocs hints to old methods that they should not be used any longer.
Shouldn't Validate come directly after the super call?