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/DesignSession.java
}
	/**
	 * Gets resource path. {@link #setBirtResourcePath(String)}
	 * 
	 * @return the resource path set in this session
	 */
	public static String getBirtResourcePath( )
	{
		return resourcePath;
	}
	/**
	 * The algorithm of how to search a file.
	 */
	protected IResourceLocator resourceLocator = new DefaultResourceLocator( );
	/**
	 * The algorithm of how to provide the absolute dimension value for the
	 * predefined absolute font size.
	 */
	protected IAbsoluteFontSizeValueProvider fontSizeProvider = DefaultAbsoluteFontSizeValueProvider
			.getInstance( );
	/**
	 * The list of open designs for the user.
	 */
	protected List designs = new ArrayList( );
	/**
	 * The list of open libraries for the user.
	 */
	protected List libraries = new ArrayList( );
	/**
	 * The user's locale.