Add chanlev,account,authhistory.

Add chanlev,account,authhistory.

NOTE: TODO: authhistory still needs tidying as discussed -
[19:15:36] <splidge3> load in authname, accountts, lastseen, logoff, numeric
[19:15:51] <splidge3> if logoff is set, display "AUTHNAME logged in at ACCOUNTTS and out at LOGOFF"
[19:16:08] <splidge3> if logoff isn't set but lastseen is, look at "numeric" on the network and see if it matches the stated authsession
[19:16:25] <splidge3> if it does, then there was a split and it came back, so just display "AUTHNAME logged in at ACCOUNTTS and is still here"
[19:16:47] <splidge3> otherwise you can say "AUTHNAME logged in at ACCOUNTTS and disappeared at LASTSEEN, maybe to return or maybe not"