Bug: Support properties that don't take a function

[tbosch]

Setting xhr.responseType = 'document' is a noop right now (given xhr = new XMLHttpRequest()).

In https://github.com/angular/zone.js/blob/master/zone.js#L347 the else case is missing, i.e.

           if (typeof fn === 'function') {
              this._o[prop] = zone.bind(fn);
            } else {
              this._o[prop] = fn;
            }

[btford]

👍