added a neuron class with basic setup
added code for random initialization of input weights
added code to print all weights at a neuron to stdout
randomized input weight initialization and printing tested
added some comments
added accessors and mutators to neuron
added class for neuron layers
added constructor method header to neuron_layer
constructor coded
added a to_string method to neuron
to_string in neuron working
added to_string to neuron_layer
tweaked output format of to_string
tried fixing the random number generation
random initialization of node weights now working
removed debugging code
added comments
added method stub for feeding forward from a previous layer
added feeding forward from a layer
added method to set all values of neurons in a layer