Added Max for floating point numbers.

math.go

@@ -21,3 +21,13 @@ func NaN() float64 {
 func NaN32() float32 {
 	return float32(NaN())
 }
+
+// Max the maximum of the two values.
+func Max(a, b float64) float64 {
+	return math.Max(a, b)
+}
+
+// Max32 the maximum of the two values.
+func Max32(a, b float32) float32 {
+	return float32(math.Max(float64(a), float64(b)))
+}