Added RouteTokenFormatter compatible GoogleAnalyticsNavigationTracker

Didn't want to just complain in #324, so here is the fix that I'm running locally. Admittedly it is just a duplicate of @christiangoudreau 's GoogleAnalyticsNavigationTracker, but to extend that would essentially override the entire file, so here I just made a copy and added the simple escaping code.

@branflake2267, I did my best to stick with the guidelines, let me know if anything slipped through, or if it should indeed extend rather than duplicate the class.