Removed offline API requests as they have been combined with normal requests.
Instead of needing a player to set/read data, we now only need their UUID. (You can use PUUIDS.getUUID(name, false); to retrieve it if you are unable to get the player online)
Marked PUUIDS.setBoolean, PUUIDS.setDouble, etc. as deprecated, now all set requests will simply use PUUIDS.set
Added PUUIDS.contains to see if a data value is contained within a plugins data list in a player's file.
Other optimizations and cleanup.
WARNING: If you use a plugin that is hooked into PUUIDs, this update changes how plugins set/get/use data and may break plugins using the older system.