Given description of method remove

Added some syntax corrections
Some corrections
List includes pointers to Neuron now
Added method remove()
Added  description of method remove()

Changed constructor of Connection
Two changes

List contain pointers to Connection objects;
Added method remove()
some corrections
Some correction and removing some methods
List of changes

Added description of methods:
removeNeuron(Neuron*);
removeNeuron(list<Neuron*>::iterator);
addConnection(Neuron*, Neuron*);
removeConnection(Neuron*, Neuron*);
removeConnection(Connection*);
Given description of 10th part of learning algorithm.