stateful interface is cumbersome when performing multiple xpath queries on one document

[lolbinarycat]

as far as i can tell, the only way to do this is to create a new NodeNavigator with htmlquery.CreateXPathNavigator for each query.

additionally, it is cumbersome to turn the result of a query into a string. having to iterate through to find the first result, and then calling Value() seems like a lot, and there is no documentation i could find that suggests this is what you are supposed to do.

[zhengchun]

1. htmlquery depend on the thirdy package golang html, it don't provide a 'Value()' method. one way is wrapper a html.Node to the new class it provides Value() and Attrs() these methods.