code: function( key, info, callback ){
      this._run("update " + this.infoTable + " set info = '" + JSON.stringify(info) + "' where id = '"+key+":info'", function(err){
        if ( err ){
          callback('Key Not Found ' + key, null);
        } else {
          callback(null, true);
        }
      });
    }
docs: updates the info doc for a key