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/core/Module.java
}
	/**
	 * Returns a unique name for an element.
	 * 
	 * @param element
	 *            the given element.
	 * @return unique name of given element.
	 */
	public String getUniqueName( DesignElement element )
	{
		return nameManager.getUniqueName( element );
	}
	/**
	 * Gets the name manager of this module.
	 * 
	 * @return the name manager of this module
	 */
	public INameManager getNameManager( )
	{
		return nameManager;
	}
	/**
	 * Returns the file name of the module file.
	 * 
	 * @return the module file name. Returns null if the module has not yet been
	 *         saved to a file.
	 */
	public String getFileName( )
	{
		return fileName;