Spigot patch update: 0005 LongHash Tweaks.

This commit adds a flat array based cache to the LongHash(Set/Map) classes leading to excellent efficiency for servers where most activity is centered around the origin (0,0)

https://github.com/EcoCityCraft/Spigot/blob/d9c76252eb02f7d0d6bea11efe77e3bb1edb0d99/CraftBukkit-Patches/0005-LongHash-Tweaks.patch