stub documentation for Thumbnail Macro, fixed an ordering problem in List of Macros, cleaned up Macro help "A".

lib/WebGUI/Help/Thumbnail.pm

@@ -0,0 +1,18 @@
+package WebGUI::Help::Thumbnail;
+
+our $HELP = {
+
+        'thumbnail' => {
+		title => 'thumbnail title',
+		body => 'thumbnail body',
+		related => [
+			{
+				tag => 'macros using',
+				namespace => 'Macros',
+			},
+		]
+	},
+
+};
+
+1;