^ nop test. ^ nnet_create() sets all neuron parameters to 0 or null, AND sets addresses. + nnet_get_random_operation(). ^ NN printing

nop test now looks at neurons[0]. neurons[0] takes its input neurons [1], [2], ... [8]. This keeps all neural connections inside the network itself. This just simplifies printing addresses for now. In the future, maybe I would want to be able to save networks that have interconnected neurons? But that probably isn't necessary.

nnet_create() now sets all neuron values to default values (weights=0, value=0, operation=0, inputs[]=NULL).
nnet_create() ALSO now enumerates the neurons it creates (gives them addresses).
+ NEURON_OP_DEFAULT and stopped jumbling (just to check the initial state of the neural network)