Added isStackable() method to BaseSTBItem
Returns true by default; if overriding class returns false, those items won't stack even if the base material is stackable.
Made Ender Tuner non-stackable.
Added the Hypersender module
Like advanced sender but works cross-world and doesn't care about distance.
Explosion & burning mechanics
Added isFlammable() method to BaseSTBBlock - by default STB blocks won't burn away now, even if the vanilla material is flammable
STB blocks which break due to burning won't drop their item form anymore; STB blocks broken due to explosion might drop the item (configurable chance)
Only generate Javadocs for the api/items/blocks subpackages.
Added the Auto Builder machine
Extract interface for ItemRegistry
import & deprecation cleanup
Move ItemRegistry into api, oops.