Removed unused MaterialData from items. MaterialData (0,:1 etc.) was useful before Minecraft 1.13 - that Minecraft update removed numeric IDs and MaterialData.
Refactored & Recreated variables and action root system.
Added suport for itemsadder (experimental)
Added JSON properties to root/subroot elements
Updated blacklists system
Added variable conditions using PAPI
Updated anti abuse systems
Fixed "harvesting materials" like POTATOES, CARROTS etc.