Updated markdown helper to use Extra mode

Utilities/Utilities/MarkdownHelper.cs

@@ -18,6 +18,7 @@ namespace Teknik.Utilities
 		{
 			// Transform the supplied text (Markdown) into HTML.
 			var markdownTransformer = new Markdown();
+		    markdownTransformer.ExtraMode = true;
 			string html = markdownTransformer.Transform(text);
 
 			// Wrap the html in an MvcHtmlString otherwise it'll be HtmlEncoded and displayed to the user as HTML :(