- Separated the kill command into /suicide and /kill

• /suicide is used for killing yourself (permission - commands.suicide)
• /kill [player] for killing others (permission - commands.kill)

- Made messages editable, with bukkit color codes
- Added some placeholders for certain events!

• %player% - get the player executing the command
• %target% - get the player the command is targeting

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- Adds custom messages for when a player is joining for the first time, coming back to, or leaving the server!
- Made messages editable to your liking with bukkit color codes!
- Added a placeholder

• %player% - get the player executing the command

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