Add MathUtil with toRadians method

DEVSIX-1310

Author: LodrKumquat

itext/itext.io/itext/io/util/MathUtil.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace iText.IO.Util
+{
+    public static class MathUtil
+    {
+        public static double ToRadians(double angdeg)
+        {
+            return angdeg / 180.0 * Math.PI;
+        }
+    }
+}