Add support to token

[linnil1]

Hi.
I found that noVNC can redirect to any machine by using token with websockify. (wiki)

However, it doesn't work on recent version.
After reading code in app/ui.js, I found that path didn't include query section in URL.
So, just add it easily by directly add document.location.search

Also, the path is always point to ws://ip:port/websocky, which make bug when I deploy it, such as I add prefixStrip in the path like 127.0.0.1:8080/mypath/vnc.html.
The solution is to add window.location.pathname in path.

[CendioOssman]

noVNC has the setting path that allows you to handle both of these things. E.g. http://example.com/mypath/vnc.html?path=%2Fmypath%2Fwebsockify%3Ftoken%3Dabc123