0.9.2

Fixed usertag commands when no usertags exist yet
Fixed tablist not showing playernames
Added commands '/pr setpromoterank <promote_rank>', '/pr setdemoterank <demote_rank>', '/pr clearpromoterank ' & '/pr cleardemoterank '
Added plugin hook for 'DeluxeTags', when enabled in 'config.yml' it will disable PowerRanks internal usertag system in favor of DeluxeTags