removed some debugging comments, removed transaction from Row->get_from_storage,...

removed some debugging comments, removed transaction from Row->get_from_storage, enabled support for new resultset attribute "execute_reliably" which signals the Balancer to send read requests to the   Also refactored connect_replicants to break down functionality into two methods and added new Balancer method to roll the replicant to the next in the queque.  added tests for all the above.