fixes#4856fixes#458fixes#4529fixes#3299
Added API method Block::getSupportType(Facing) : SupportType
Added SupportType enum
fixes torch, lantern, door etc. placement on slabs and upside-down stairs
This event is currently fired for tree and bamboo growth. Its intended use is for any plant growth that affects multiple blocks at once.
TODO: We could explore using this for cacti and sugarcane?