Fix isolation of pushState and replaceState

[nevar]

If some user want add own hook on pushState:

oldPush = history.pushState;
history.pushState = function(state, title, url) {
    oldPush(state, title, url);
    document.title = title;
}

He will face up with problem that replaceState now work as pushState.

Private localPushState function solves this problem.

Also if some not attentive user write pushState(state, title, url, some) he also face up with the same problem.

Function for pushState solves this problem.

[devote]

Thanks for you commit!

Unfortunately, I can not make your changes in the branch. Since they do not completely solve the problem.

I made new changes to the branch, subject to your problem.