Some new features and bugfixes

SinkAntiSpam
* Add ListWarns command
* Fix old SinkCommand Permissions
* WarnUtil: Rename warnPlayer() to warn()
* Use Apache Commons DomainValidator for domains check
* Save warnings when they are given, not when the plugin is unloading

SinkIRC:
* Fix Unkown command message

SinkLibrary
* SinkTabCompleter: Remove debug messages, add support for case insensitive tab completition
* Rename BanInfo to BanData
* User, BanData: Rename getUnbanTime to getTimeOut, addd getUnbanTime for time when the user got unbanned
* Add Bannable interface
* SinkDebugCommand: remove reloadusers, add whoami, remove debug enabled check
* SinkReloadCommand: reload users
* Rename UserConfigurationListener to IngameUserListener
* IrcCommandListener: check for unknown and unauthorized commands
* IngameUser: add hasPlayedBefore(), kick player on ban
* Debug: fix check for old debug method