Make print() script function changeable, defaults to Console.WriteLine

PorygonSharpTests/UnitTest1.cs

@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using System.Linq;
 using NUnit.Framework;
 using PorygonSharp;
@@ -122,11 +123,26 @@ namespace PorygonSharpTests
             }
         }
 
+        [Test]
+        public void TestPrint()
+        {
+            using (var script = new Script("print('test')"))
+            {
+                using (var sw = new StringWriter())
+                {
+                    Console.SetOut(sw);
+                    Assert.False(script.Diagnostics.HasErrors());
+                    script.Evaluate();
+                    var s = sw.ToString();
+                    Assert.AreEqual("test\n", s);
+                }
+            }
+        }
 
         [Test]
         public void TestHash()
         {
-            var hash = HashedString.ScriptHash("Foo");
+            var hash = "Foo".ScriptHash();
             Assert.AreEqual(193501609, hash);
         }
     }