Changes

Summary

1. Expand Structure Block API (details)

Commit c03d8909d9822d1e8fe62a2e1550ae765f940893 by md_5 (md_5) Expand Structure Block API
	src/main/java/org/bukkit/block/structure/StructureRotation.java
	src/main/java/org/bukkit/block/structure/UsageMode.java
	src/main/java/org/bukkit/block/structure/Mirror.java
	src/main/java/org/bukkit/block/Structure.java