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
if ( element == null )
			return null;
		return element.getHandle( module );
	}
	/**
	 * Returns a list containing errors during parsing the design file.
	 * 
	 * @return a list containing parsing errors. Each element in the list is
	 *         <code>ErrorDetail</code>.
	 * 
	 * @see ErrorDetail
	 */
	public List getErrorList( )
	{
		return module.getErrorList( );
	}
	/**
	 * Returns the file name of the design. This is the name of the file from
	 * which the design was read, or the name to which the design was last
	 * written.
	 * 
	 * @return the file name
	 */
	public String getFileName( )
	{
		return module.getFileName( );
	}
	/**
	 * Returns the flatten Parameters/ParameterGroups of the design. This method
	 * put all Parameters and ParameterGroups into a list then return it. The