Custom discs now output redstone in jukeboxes and can be inserted using hoppers and droppers
This only works with the vanilla behaviour, the jukebox gui behaviour has both redstone and hopper input/output disabled
Added an option to set the disc and fragment limit for each loottable
Added an option to set the disc and fragment drop chance in every loottable
General code refactoring
Fixed a bug where discs could be deleted in the Jukebox gui
Fixed a bug where the playing disc in the Jukebox gui wouldn't have the right meta data applied
Fixed a bug where the playing disc would show up as a normal disc when opening the Jukebox gui again
While working on the plugin I noticed that inserting a disc into a jukebox using a dropper would cause a server crash, the plugin will prompt the user to update spigot if the version is not patched