Bug 152828 Add the projectFolder property on module
When user doesn't set the resource folder path in designer, there should be a default working path for Birt to manage the report design and find the related resources. A new property should be added on Module: name: projectFolder type:URL This property only can be given from the open design method from session but should not be set after the module initialized. Concern about the backward compatiblity issue, a new method will be added. Open design with a config argument.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* @see #save()
	 */
	public void saveAs( String newName ) throws IOException
	{
		setFileName( newName );
		save( );
	}
	/**
	 * Writes the report design to the given output stream. The caller must call
	 * <code>onSave</code> if the save succeeds.
	 * 
	 * @param out
	 *            the output stream to which the design is written.
	 * @throws IOException
	 *             if the file cannot be written to the output stream
	 *             successfully.
	 */
	public void serialize( OutputStream out ) throws IOException
	{
		assert out != null;
		module.prepareToSave( );
		module.getWriter( ).write( out );
		module.onSave( );
	}
	/**
	 * Sets the name of the author of the design report.
	 * 
	 * @param author
	 *            the name of the author.
	 */