Added default id loaded from File.yml
Added RockyEnchantment for custom enchantments.

Signed-off-by: Wolftein <agustin.l.alvarez@hotmail.com>
Fixed Chunk syncronization issue.
Added PacketPluginMessage wrapper for the 250CustomPayload packet.
Fixed setVelocity(), now can be use to change a vanilla player velocity.

Signed-off-by: Wolftein <agustin.l.alvarez@hotmail.com>