perceptron implementation changed + perceptronLearningAlgorithm and tests

include/NeuralNetwork/FeedForward/Perceptron.h

@@ -13,7 +13,15 @@ namespace FeedForward {
 
 			using Network::computeOutput;
 			using Network::randomizeWeights;
-			using Network::operator[];
+
+			inline std::size_t size() const {
+				return layers[1]->size();
+			}
+
+			inline NeuronInterface& operator[](const std::size_t& neuron) {
+				return layers[1]->operator[](neuron);
+			}
+
 		protected:
 	};
 }