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.
So the tricky bit is that I always used to trigger this (for my own queries) with `epoch 1234567890`.  In order to keep that triggering (which I think is reasonable since I'm a user. :D), we need to keep `epoch` in the trigger list, but we can't just deal with the 'remainder' since we don't know how well specified the trigger bit was.

I know they aren't preferred, but I think it might be time for a regex trigger.  Any objections?