code: function collectionCount(name, qry, opts) {
        return Crux.promise(function(resolve, reject) {
          var col = self.mongo.connection.db.collection(name);
          col.count(qry, opts || {}, function(err, count) {
            if(err) {
              return reject(err);
            }
            resolve(count);
          });
        });
      }
docs: /*
  Simple collection count for mongo