* Made a lot of internal changes that will make adding new features easier
* Machines that can't be correctly loaded for whatever reason are no longer removed (This also means that Citizens entities who keep the same entity UUID between server restarts should now work with Slot Machine)
+ Added 'weight' to items :

• Weight can be changed in the config file for each item
• Weight affects an item's probability to be won
• Weight can go from 0 to 2 billions (0 means that the item cannot be won)
• Weight does not affect the probability of the item to be shown when the machine is openned

+ The SlotMachine UUID has been added to the informations tool
* The /openmachine command now works with the SlotMachine UUID rather than the entity's UUID


Upcoming features :

• Slot Machines on blocks
• The ability to switch a Slot Machine from an entity to a block (and vice versa)
• The ability to copy a Slot Machine
• An online editor for your Slot Machines