Fix missed diff for chat packets. Fixes BUKKIT-4666

This commit removes chat wrapping. It is no longer needed, as clients
properly render lines with line breaks.

This commit also changes an outgoing chat message to use the vanilla
behavior for indicating a client cannot chat with commands-only setting.
Return instance of CraftInventoryBeacon for Beacons.  Fixes BUKKIT-4521
Removed overmapping.