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/writer/ModuleWriter.java
iter = list.iterator( );
			while ( iter.hasNext( ) )
			{
				( (DesignElement) iter.next( ) ).apply( this );
			}
		}
	}
	/**
	 * Writes the values for user properties.
	 * 
	 * @param obj
	 *            the element that has user properties.
	 */
	protected void writeOverridenPropertyValues( DesignElement obj )
	{
		
		if ( obj.getExtendsElement( ) == null )
			return;
		writer
				.conditionalStartElement( DesignSchemaConstants.OVERRIDDEN_VALUES_TAG );
		Iterator iter = new ContentIterator( getModule( ), obj );
		while ( iter.hasNext( ) ) 
		{
			DesignElement virtualElement = (DesignElement) iter.next( );
			writer
					.conditionalStartElement( DesignSchemaConstants.REF_ENTRY_TAG );
			long baseId = virtualElement.getBaseId( );
			writer.attribute( DesignSchemaConstants.BASE_ID_ATTRIB, new Long(