Bug 188578 Add "displayColumnName" on TabularLevel
Add Property "displayColumnName" on TabbularLevel and corresponding APIs on handle. Property Type: expression.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
writer.startElement( DesignSchemaConstants.STYLE_TAG );
		super.visitStyle( obj );
		writeStyleProps( obj );
		writer.endElement( );
	}
	/**
	 * Write the style properties for either a shared style, or the "private
	 * style" for a styled element.
	 * 
	 * @param obj
	 *            the styled element
	 */
	private void writeStyleProps( DesignElement obj )
	{
		
		property( obj, IStyleModel.BACKGROUND_ATTACHMENT_PROP );
		property( obj, IStyleModel.BACKGROUND_COLOR_PROP );
		property( obj, IStyleModel.BACKGROUND_IMAGE_PROP );
		property( obj, IStyleModel.BACKGROUND_POSITION_X_PROP );
		property( obj, IStyleModel.BACKGROUND_POSITION_Y_PROP );
		property( obj, IStyleModel.BACKGROUND_REPEAT_PROP );
		
		property( obj, IStyleModel.FONT_FAMILY_PROP );
		property( obj, IStyleModel.FONT_SIZE_PROP );
		property( obj, IStyleModel.FONT_WEIGHT_PROP );
		property( obj, IStyleModel.FONT_STYLE_PROP );
		property( obj, IStyleModel.FONT_VARIANT_PROP );
		property( obj, IStyleModel.COLOR_PROP );
		property( obj, IStyleModel.TEXT_LINE_THROUGH_PROP );
		property( obj, IStyleModel.TEXT_OVERLINE_PROP );