Please support integration with a webpack application

I tried to run guide.js with a Vue.js + Webpack + Rails application but I failed to.

I somehow managed to modify `dist/guide.js` to be loaded within a Vue.js ES2016 component but tours never actually worked. I managed to get `Guide` object and call the library methods but when I ran `Guide.show()` or `tour.start()` it either went to a dead-loop or reported about exceeded call stack.