Admin Panel

[timiimit]

Backend implements AdminPanelController which already allows some of these operations.
Final admin panel should allow the following operations (ordered by importance):

• Edit Account.Flags of other users
• Add/edit/remove entries with ClientService
• Add/edit/remove entries with TrustedGameServerService
• Change password of any user (temporary until actual password reset feature is implemented)
• View flagged stats
• Delete or unflag flagged stats
• Ability to edit cloudstorage system files
• Deletion of all sessions related to specific account
• Deletion of account and all asociated information in db
• Temporary suspension of account

[Saibamen]

Related: #122