- Renamed JsonCache to PlayerDataStorage

* the methods inside it renamed to fit with class name
  * cache folder changed into playerdata
- Renamed LimboPlayer to PlayerData
- Added fly speed to PlayerData
- Removed player's name from PlayerData object
- Added getPlayerLocationOrSpawn method in spawn loader.

src/main/java/fr/xephi/authme/process/logout/AsynchronousLogout.java

@@ -50,7 +50,7 @@ public class AsynchronousLogout implements AsynchronousProcess {
             database.updateQuitLoc(auth);
         }
 
-        limboCache.updateLimboPlayer(player);
+        limboCache.updatePlayerData(player);
         playerCache.removePlayer(name);
         database.setUnlogged(name);
         syncProcessManager.processSyncPlayerLogout(player);