Bug 187213 Provid a writer to serialize design in document without any white space.
Add a new writer for serialize design in document without any withe space.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/XMLWriter.java
*            the text to write
	 */
	public void taggedText( String tag, String text )
	{
		if ( text == null )
			return;
		startElement( tag );
		text( text );
		endElement( );
	}
	/**
	 * Conditionally starts an element. The element will appear in the file only
	 * if it, or one of its children, has content. The element will not appear
	 * if neither it, nor any of its children, have either an attribute or text.
	 * Use <code>endElement</code> to close the conditional element.
	 * 
	 * @param element
	 *            element name
	 */
	public void conditionalStartElement( String element )
	{
		pendingElementStack.push( element );
	}
	/**
	 * Writes an attribute using an HTML RGB value: #RRGGBB.
	 * 
	 * @param attrName
	 *            attribute name
	 * @param rgb
	 *            RGB value