Package cleanup

- authme.cache to authme.data
- Rename PlayerData to LimboPlayer to match with LimboCache
- Move authme.converter to authme.datasource.converter
- Split output package into output and message

src/main/java/fr/xephi/authme/task/purge/PurgeExecutor.java

@@ -16,7 +16,7 @@ import javax.inject.Inject;
 import java.io.File;
 import java.util.Collection;
 
-import static fr.xephi.authme.util.StringUtils.makePath;
+import static fr.xephi.authme.util.FileUtils.makePath;
 
 /**
  * Executes the purge operations.

src/main/java/fr/xephi/authme/task/purge/PurgeService.java

@@ -16,6 +16,8 @@ import java.util.Calendar;
 import java.util.Collection;
 import java.util.Set;
 
+// TODO: move into services. -sgdc3
+
 /**
  * Initiates purge tasks.
  */