Initial implementation of glabels-batch.

Note: must currently use QGuiApplication instead of QCoreApplication to
support QFont.  Unfortunately, this means that glabels-batch must run
within a windowing system.  Ideally, it would not have this requirement.

glabels/TemplatePickerItem.h

@@ -36,6 +36,8 @@ namespace glabels
 	///
 	class TemplatePickerItem : public QListWidgetItem
 	{
+	public:
+		static const int SIZE = 80;
 
 		/////////////////////////////////
 		// Life Cycle