Scrolling with middle button in Chrome

### Problem

we are using fullPage on https://seznam.cz/aplikace and when I switch to "scroll mode" (on windows with middle mouse button) and start scrolling, scroll mode ends when url is changed.

I made some tests in jsfiddle and it seems that this only happens in Chrome and when you change hash with `window.location.hash`, when you use`window.history.push/replaceState` it works as expected

You can see the problem on following gif
http://i.imgur.com/fKLHFO5.gif
### Specs

System: Window 7
Browser: Chrome 50.0.2661.102 m (FF and IE seems to work fine)
### Proposed solution

use `window.history` API if browser supports it, otherwise fallback to `window.location.hash`