The symbolic diff equ output soma membrane potential is now integrated into brian's code

The Um output is applied directly as each neuron's voltage (V) for each Ms.  The network_operation achieves this.  The computations of the symbolic diff equ are now accessible for plotting and all of brian's other functionality.  A new output display has been added named displayAllNeuronMemPotentials which shows the changes over time of Um.  The original output display of 'total positive neuron membrane voltages' was not capturing the output Mv well because they are largely negative now for some reason.  Next work is to understand how well the calculations are performing and try to have the model learn the weights better.  Also, I will perhaps add more variables than just 'V' for plotting and other things since 'ge' and 'gi' were removed due to different formulas being used.