[+] Fully revamped the mobs & items folder (all .yml files names)
[+] Added auto-migration to the new format
[+] Added the ability to choose the display name for each spawner
[+] Added the ability to add custom names for each drop (by default it's set to none)
[~] You can now simply remove any drop you want from any spawner without getting any errors
[~] Fixed modifier messages not being sent