Minor - rename LimboPlayer methods + code householding

- Rename *taskId methods to *task to reflect what they handle
- Remove usages of Wrapper where applicable
- Replace some uses of legacy Settings with NewSetting calls

src/main/java/fr/xephi/authme/process/register/ProcessSyncEmailRegister.java

@@ -49,11 +49,11 @@ public class ProcessSyncEmailRegister implements Process {
         if (limbo != null) {
             if (time != 0) {
                 BukkitTask id = service.runTaskLater(new TimeoutTask(service.getAuthMe(), name, player), time);
-                limbo.setTimeoutTaskId(id);
+                limbo.setTimeoutTask(id);
             }
             BukkitTask messageTask = service.runTask(new MessageTask(
                 service.getAuthMe(), name, service.retrieveMessage(MessageKey.LOGIN_MESSAGE), msgInterval));
-            limbo.setMessageTaskId(messageTask);
+            limbo.setMessageTask(messageTask);
         }
 
         player.saveData();