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/api/util/DocumentUtil.java
ReportDesign target = null;
		ReportDesign source = (ReportDesign) designHandle.getModule( );
		
		List list = (List) source.getLocalProperty( source.getRoot( ),
				IModuleModel.LIBRARIES_PROP );
		if ( list == null || list.size( ) == 0 )
		{
			designHandle.serialize( out );
			return;
		}
		target = localizeDesign( source );
		assert target != null;
		target.handle( ).serialize( out );
	}
	/**
	 * Gets a localized report design based on the source design.
	 * 
	 * @param source
	 *            the source design
	 * @return the localized report design based on the source design
	 */
	static ReportDesign localizeDesign( ReportDesign source )
	{
		assert source != null;
		ReportDesignSerializer visitor = new ReportDesignSerializer( );
		source.apply( visitor );
		return visitor.getTarget( );
	}
}