Feature/math util (#22)

Development supports the math package

mathUtil/max_test.go

@@ -0,0 +1,21 @@
+package mathUtil
+
+import "testing"
+
+func TestMaxEmpty(t *testing.T) {
+	s := []int{}
+	var expected int = 0
+	res := Max(s)
+	if res != expected {
+		t.Errorf("max error %d", res)
+	}
+}
+
+func TestMax(t *testing.T) {
+	s := []int{3, 7, 1, 9, 3, 0, 2, 2}
+	var expected int = 9
+	res := Max(s)
+	if res != expected {
+		t.Errorf("max error %d", res)
+	}
+}