Just added dropout to code.. --->  Need to do more testing on this new code.  Is it working properly???  Then, how to proceed?  ;;; from recent commits: Continue to make progress.  Still have to get network display working correctly.  Also want to implement Hinton's "random neurons learning" paradigm.  Previous, important notes:  Now working on 4Class problem to illustrate "binding of multiple cluster-pairs" with 3rd and 4th inputs that allow very tight clusters and GREAT generalization IF the appropriate cluster-pairs are "bound together" in multiple ways!!  Yipee.