Unix Time Updates.

This removes the `time` trigger from `UnixTime` as requested in #607.  It also updares the output to show the epoch as used and the time which results which is vaguely more useful.
I feel that 'epoch' and 'timestamp' are too general of a term to trigger this IA without any arguments since they can mean something other than Unix time. Maybe it should be like 'time'? What do you think?