This is a change to how packets are transferred; the API has not been changed.
While the difference may be unnoticable when using unencrypted packets, because of MessagePack's compact size and better handling of byte values encrypted packets should transfer faster.
The Download group of packets was in desperate need for a restructuring.
Now, instead of using `DownloadServerList` to list everything, different object types now are downloaded through their own seperate packets. (Improving network efficiency)
This commit removes the org.JSON library where alternatives are already provided (Bungee & Bukkit provide Gson). This change was made to improve compatability with BungeeCord plugins and reduce file sizes.
This means big changes to the SubData API, which heavily relied on org.JSON. Now we submit our data through YAMLSection to be converted and sent over the network.
This marks the beginning of SubServers.Host. As of now it is just a
simple plugin loading API, but it is planned to become a way to host
servers on other machines.
Also, SubAPI now checks to make sure variables aren't null in many
places.
