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
IDesignElement,
			IPropertySet,
			IDesignElementModel
{
	/**
	 * The max length the display label for every element. If the length exceeds
	 * this limit, the exceeding part will be shown as "...".
	 */
	private static final int MAX_DISPLAY_LABEL_LEN = 30;
	/**
	 * Elements have an optional name. The name may be required by some element
	 * types. If so, the derived element class should enforce the use of the
	 * name. The name is non-localizable.
	 * <p>
	 * The name often occurs in a name space. Derived classes must enforce the
	 * name space rules. This class simply maintains the name itself.
	 */
	protected String name = null;
	/**
	 * Elements are structured in a hierarchy. The implementation of the
	 * container-to-child relationship must be defined in derived classes. This
	 * base class defines the child-to-container relationship.
	 */
	protected DesignElement container = null;
	/**
	 * Slot in the container in which this element resides.
	 */
	protected int containerSlotID = NO_SLOT;
	/**
	 * Listeners are the objects that want to be notified of events. Contents