v1.4.2

Version 1.4.2:
* Added muteall and unmuteall commands
* Me and tell commands will be denied if the player can not chat or has
been muted
* Added list feature to mute command
* Added permissions: hchat.mute.list, hchat.command.muteall,
hchat.command.unmuteall
* The plugin does no longer update automatically
* Added permission hchat.notify.update for getting notified when a
plugin update has been found
* Fixed bugs