add content order text extractor and example of use

examples/ExtractTextWithNewlines.cs

@@ -0,0 +1,22 @@
+namespace UglyToad.Examples
+{
+    using System;
+    using PdfPig;
+    using PdfPig.DocumentLayoutAnalysis.TextExtractor;
+
+    internal static class ExtractTextWithNewlines
+    {
+        public static void Run(string filePath)
+        {
+            using (var document = PdfDocument.Open(filePath))
+            {
+                foreach (var page in document.GetPages())
+                {
+                    var text = ContentOrderTextExtractor.GetText(page, true);
+
+                    Console.WriteLine(text);
+                }
+            }
+        }
+    }
+}