Some novice questions

1) Please add a short license name to the main page (readme.md)
https://github.com/AndrewMayorov/ObjectXPathNavigator/blob/master/sdf.XPath/license.txt
i.e. is it <a href="https://opensource.org/licenses/MIT">MIT</a> or custom one ?

2) please add an icon for package (128x128.png),

3) please explain, how this code is different from
https://msdn.microsoft.com/en-us/library/ms950764.aspx
