Change some collections and cache player names.
Add getConfig() to AbstractListener.
Don't check region group if the flag value is null.
Throw IllegalArgumentException if trackParentCause() is given a Block.
Remove use of ObjectArrays.concat() in ApplicableRegionSet.
Catch FileNotFoundException in YamlFileStore.
Reduce the number of BlockFromTo events handled.
Try last ChunkState accessed in ChunkHashTable.
Cache the set made in ApplicableRegionSet.
Don't perform spatial queries for location->location checks until needed.