Make compatible with Turbolinks

[asgeo1]

Ruby on Rails apps often use Turbolinks (https://github.com/rails/turbolinks)

The call to stopPropagation() in navgoco, prevents Turbolinks from working.

Is stopPropagation() actually needed?

I'm removed the call to stopPropagation in my fork, and it seems to work fine without it.

Do you want me to send you a PR?