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
/**
	 * Gets a property value given its internal name. This version checks only
	 * this one object. That is, it gets the "local" property value. The
	 * property name must also be valid for this object. The name can be a
	 * built-in property name, or a user-defined property name. The value is set
	 * without checking the name for validity.
	 * <p>
	 * Part of: Property value system.
	 * 
	 * @param module
	 *            the module
	 * @param propName
	 *            name of the property to set. Must be valid. Can be a
	 *            system-defined or user-defined property name.
	 * @return the property value, or null if no value is set
	 */
	public Object getLocalProperty( Module module, String propName )
	{
		ElementPropertyDefn prop = getPropertyDefn( propName );
		if ( prop == null )
			return null;
		return getLocalProperty( module, prop );
	}
	/**
	 * Gets a property value given its definition. This version checks only this
	 * one object. That is, it gets the "local" property value. The property
	 * name must also be valid for this object.
	 * <p>
	 * Part of: Property value system.
	 *