Make Data::Dumper work just like DBI would (except the
ref is MemcacheDBI).

If you want to peer Dumper the MemcacheDBI bit then Dumper
$memd->{'MemcacheDBI'} is what you really want to do.
Cleanup some code and a revamp to the methods.

Now you can use this as a drop in for dbh and get memd drop in replacement for memcache (for
set/get only)