fromEvent is broken in IE8 when used with querySelectorAll

[apiv]

I've been using RxJS with great success so far in a project that needs to support IE8. I've recently found an issue with Rx.Observable.fromEvent in IE8. This issue prevents using fromEvent with querySelectorAll. I've also found a fix for that problem, which I've included in this pull request.

To explain what's wrong with IE8:

• document.querySelectorAll returns a StaticNodeList instead of NodeList
• Object.prototype.toString.call() works differently in IE8:

// In IE8
// Assume `obj` is an instanceof NodeList
console.log(Object.prototype.toString.call(obj)) // => '[object Object]'
console.log(Object.prototype.toString.call(obj.constructor) // => '[object NodeList]'
console.log(Object.prototype.toString.call(MyClass)) // => '[object NodeList]'

// In an actual web browser
// Assume `obj` is an instanceof NodeList
console.log(Object.prototype.toString.call(obj)) // => '[object NodeList]'
console.log(Object.prototype.toString.call(obj.constructor)) // => '[object Function]'
console.log(Object.prototype.toString.call(MyClass)) // => '[object Function]'

[mattpodwysocki]

@ajp427 closing as I have merged the PR