WormholeXTreme

Additions:

• Added tab completion for all WXT commands.

Fix ups:

• Fixed up command /wormhole (alias /wxt) for configuring specific gates.
• Fixed Cannot get ID of Modern Material when converting gate(s) to custom mode.
• Fixed occasional org.bukkit.entity.Player[] org.bukkit.Server.getOnlinePlayers() error when reloading plugin with custom mode gates.
• Fixed DB gate data nullifying after converting to custom gate mode.
• Fixed portal material IDs on /wormhole to match modern Minecraft.
• Corrected material serialisation format between parser versions/

Cleanup of command outputs /wxstatus and /wormhole syntax help to match rest of the plugin's outputs.