Bug 130492 Provide a method to serialize the report with library information.
Currently, when engine generate the report document file, the document does not contain any library information. That will cause many propblem on server side. Model should provide a method to serialize the report with library information to a stream so that the generated report document can contain all information that the report need.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
return displayLabel;
		}
		MetaDataDictionary dictionary = MetaDataDictionary.getInstance( );
		IElementDefn elementDefn = dictionary.getElement( getElementName( ) );
		if ( StringUtil.isBlank( displayLabel ) )
		{
			displayLabel = elementDefn.getDisplayName( );
		}
		if ( StringUtil.isBlank( displayLabel ) )
		{
			displayLabel = elementDefn.getName( );
		}
		return displayLabel;
	}
	/**
	 * Returns the name of this element for display label.
	 * 
	 * @return the name of this element for display label.
	 */
	protected String getNameForDisplayLabel( )
	{
		return getName( );
	}
	/**
	 * All descriptive text should be "elided" to a length of 30 characters. To
	 * elide the text, find the first white-space before the limit, truncate the
	 * string after that point, and append three dots "...".
	 * <p>
	 * 
	 * @param displayLabel