popState slicing bug

[jhorman]

If base is

http://localhost.local:5000/

and loc is

http://localhost.local:5000/home

then

loc = loc.slice(base.length + 1, loc.length);

produces ome instead of home.

[jhorman]

I think there is also then an issue with _extractLocation. Line 173 prepends "/", which is wrong if the baseURI has a "/" on the end.