Implement bold font; make tests pass again.

- NEU: Überschriften und pathologische Werte werden fett gedruckt.
- FIX: Kleinere Bugfixes.

Tests/Formatter/DocumentWriterTest.cs

@@ -21,6 +21,7 @@ using System.Linq;
 using System.Text;
 using NUnit.Framework;
 using zaaReloaded2.Formatter;
+using Microsoft.Office.Interop.Word;
 
 namespace Tests.Formatter
 {
@@ -95,5 +96,13 @@ namespace Tests.Formatter
             Assert.IsFalse(_docWriter.HasBufferedText);
             Assert.AreEqual(String.Empty, _docWriter.ToString());
         }
+
+        [Test]
+        public void TextMarkup()
+        {
+            _docWriter.Document = new Document();
+            _docWriter.WriteLine("This is not bold. <b>This is bold!</b>");
+            _docWriter.Flush();
+        }
     }
 }