feat(router): implement canLoad

modules/@angular/router/src/utils/collection.ts

@@ -10,6 +10,7 @@ import 'rxjs/add/operator/concatAll';
 import 'rxjs/add/operator/last';
 
 import {Observable} from 'rxjs/Observable';
+import {fromPromise} from 'rxjs/observable/fromPromise';
 import {of } from 'rxjs/observable/of';
 
 import {PRIMARY_OUTLET} from '../shared';
@@ -115,4 +116,18 @@ export function waitForMap<A, B>(
   } else {
     return of (res);
   }
+}
+
+export function andObservables(observables: Observable<Observable<any>>): Observable<boolean> {
+  return observables.mergeAll().every(result => result === true);
+}
+
+export function wrapIntoObservable<T>(value: T | Observable<T>): Observable<T> {
+  if (value instanceof Observable) {
+    return value;
+  } else if (value instanceof Promise) {
+    return fromPromise(value);
+  } else {
+    return of (value);
+  }
 }