perceptron implementation changed + perceptronLearningAlgorithm and tests

tests/perceptron.cpp

@@ -0,0 +1,16 @@
+#include <NeuralNetwork/FeedForward/Perceptron.h>
+
+#include <assert.h>
+#include <iostream>
+
+int main() {
+	NeuralNetwork::FeedForward::Perceptron p(2,1);
+
+	p[1].weight(0)=-1.0;
+	p[1].weight(1)=1.001;
+
+	assert(p.computeOutput({1,1})[0] == 1.0);
+	p[1].weight(1)=0.999;
+
+	assert(p.computeOutput({1,1})[0] == 0.0);
+}