changes the plotting function so that target stimuli are highlighted in the plots. Separates learning rates multiplier into two distinct sets of variables alpha (acetylcholine) and delta (dopamine). Only the alphas are now in use (the delta variables exist but have no effect). These variables for now change nothing to the network. The randActions=True problem seems to be fixed.
fixes a problem with the batch learning (activation is now computed within each mini batch separately). Also adjusts the singleActiv value (now set to 5) which yields better distribution of the weights over the input space.