Merge pull request #11667 from eric-wieser/q-fixes

Add argumentless Q()

q/Q-tests.ts

@@ -4,6 +4,7 @@
 import q = require('q');
 
 Q(8).then(x => console.log(x.toExponential()));
+Q().then(() => console.log("nothing"));
 
 var delay = function (delay: number) {
     var d = Q.defer<void>();

q/Q.d.ts

@@ -12,6 +12,10 @@ declare function Q<T>(promise: Q.IPromise<T>): Q.Promise<T>;
  * If value is not a promise, returns a promise that is fulfilled with value.
  */
 declare function Q<T>(value: T): Q.Promise<T>;
+/**
+ * Calling with nothing at all creates a void promise
+ */
+declare function Q(): Q.Promise<void>;
 
 declare namespace Q {
     interface IPromise<T> {