Fixed Typo in Solutions for ANN (ANN renamed as MLP class)

Author: Valerio Maggio

solutions/sol_111.py

@@ -1,4 +1,4 @@
-ann = ANN(2, 10, 1)
+ann = MLP(2, 10, 1)
 %timeit -n 1 -r 1 ann.train(zip(X,y), iterations=2)
 plot_decision_boundary(ann)
 plt.title("Our next model with 10 hidden units")

solutions/sol_112.py

@@ -1,4 +1,4 @@
-ann = ANN(2, 10, 1)
+ann = MLP(2, 10, 1)
 %timeit -n 1 -r 1 ann.train(zip(X,y), iterations=100)
 plot_decision_boundary(ann)
 plt.title("Our model with 10 hidden units and 100 iterations")