Added LeakyReLu (parameter is currently hardcoded)

src/main/java/ActivationFunctions.java

@@ -52,4 +52,20 @@ public class ActivationFunctions {
         }
         return B;
     }
+
+    public static SimpleMatrix LeakyReLu(SimpleMatrix A) {
+        SimpleMatrix B = new SimpleMatrix(A);
+        for (int i = 0; i < A.getNumElements(); i++) {
+            B.set(i, Math.max(0.001 * A.get(i), A.get(i)));
+        }
+        return B;
+    }
+
+    public static SimpleMatrix LeakyReLuPrime(SimpleMatrix A) {
+        SimpleMatrix B = new SimpleMatrix(A);
+        for (int i = 0; i < A.getNumElements(); i++) {
+            B.set(i, A.get(i) < 0 ? 0.001 : 1);
+        }
+        return B;
+    }
 }