Don't cause a memory leak if a world used for protections unloads, make protections work if a world used for protections is unloaded then reloaded.

Signed-off-by: Ross Allan <rallanpcl@gmail.com>
Merge https://github.com/Tux2/GriefPrevention
added some 1.5 blocks to appropriate methods. recognize Hoppers and Droppers as Theftable containers; recognize Hoppers,Droppers, and Redstone Blocks as Player-made in RestoreNature Processing.