allow banning of immune players if the player has banhammer.ban.permanent
add missing permission to set
complete stubbed methods
remember to set the state to normal when creating a new ban
swap creator and player
return blank HashSet if no bans set yet.
complete method stub
fix NPE in AuditCommand
fix a couple of bugs with ban creation
fix NPE when looking up a player who has never been banned before
added additional headers when checking history of multiple players
history command now supports multiple players
fix a number of issues with the audit command