Improved system management players.
Fix all fail management.

The current row:
* Guest (Player)
* Admin

In the new version:
* Guest (Player)
* Moderator
* Admin
* Owner




The priority rankings:

Player < Moderator < Admin < Owner

Power of the moderator:
 * Kick / Ban / Teleportation

Power of admin:
 * Kick / Ban / Teleportation / Enabled The AdminMod
 * Reboot Server
 * ChangeMap
 * Customizing the Map with ZMap Maker
 * Add Moderator / Moderator Removed

Power of Owner:
 * Kick / Ban / Teleportation / Enabled The AdminMod
 * Reboot Server
 * ChangeMap
 * Customizing the Map with ZMap Maker
 * Add Moderator / Administrator Add / Add Owner
 * Removed Moderator / Removed Administrator / Owner Removed