added parameter serde methods to RBM
added unit test for parameter averaging serde mechanics
added unit test for parameter averaging serde mechanics redux
tweaked the RBM MNIST viz test to seperate out the images into subdirectories and only write the real img 1x
tweaked how we name the real number image in RBM MNIST viz test
rebuilt some of the parameter serde code for DBNs
added unit test for the DBN parameter serde code supporting parameter averaging