Angular2 feat(http): add support for withCredentials

CORSBrowserXHR.ts

import {BrowserXhr, HTTP_PROVIDERS} from "angular2/http";
import {Injectable, provide} from "angular2/core";

@Injectable()
class CORSBrowserXHR extends BrowserXhr{
    build(): any{
        var xhr:any = super.build();
        xhr.withCredentials = true;
        return xhr;
    }
}

//...
//In your bootstrapped providers:
HTTP_PROVIDERS,
provide(BrowserXhr, {useClass: CORSBrowserXHR}),
//...