JukeAlert - Updated snitches to include the last visit date by a semi
owner (moderator / owner).  This is included as a date-time column in
the snitch table directly with appropriate index.  Date being logged
as UTC with 100 batched up before inserting (or 1 sec - same as other
flush).  This change doesnt include any of the other requested functionality
and is just the basic block for the other ones (querying/culling).
JukeAlert - Added new JAList command
Added new command /jalist that will list out all snitches that belong to
a group you are either owner or moderator of (including personal groups).
This will include Hours To Cull (number of hours before this snitch is culled)
as well as the number of events that a logged snitch has picked up currently.
JukeAlert - Removed dead code
Found some debug code that was checked in by accident.  Removed.
JukeAlert - Added snitch detail and snitch culling
Added final procedure which cursors over snitches and deletes their detail
records and finally their actual snitch record.  Configurable via the
two new settings values.  If the log or non-logged setting values are
set to 0 (default value) then no snitch culling takes place.
If they are set to a positive non-zero number of days, they will take place
at the first restart of the server after a snitch has 'ran out of time'
based on its last-visit date.
JukeAlert - updated version in plugin file.
Merge pull request #71 from MCL0stman/master

Implementation juke alert culling based on owner last visit date.