- 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/task/MessageTask.java

@@ -45,8 +45,8 @@ public class MessageTask implements Runnable {
                     player.sendMessage(ms);
                 }
                 BukkitTask nextTask = bukkitService.runTaskLater(this, interval * TICKS_PER_SECOND);
-                if (limboCache.hasLimboPlayer(name)) {
-                    limboCache.getLimboPlayer(name).setMessageTask(nextTask);
+                if (limboCache.hasPlayerData(name)) {
+                    limboCache.getPlayerData(name).setMessageTask(nextTask);
                 }
                 return;
             }