SpectatorPlus

This update focuses on arenas.

Here's a list of changes:

• /spectate alias: /spec
• Fixed chests, doors, redstone etc. being usable by spectators
• Arena mode now adds a book, which is used to select the arena you want to spectate
• Stopped players getting burnt if they stop spectating while in fire
• New subcommands: /spec arena list and /spec arena add <name>

• Still doesn't save the player's inventory - just clears it.
• IMPORTANT: Remember to delete the previous config if you have a previous version of the plugin.