Refresh master with initial release/0.24 snapshot (#332)

* Initial port of release/0.24 source code

* Fix additional headers

* Fix a typo in launch.json

src/vs/base/node/pfs.ts

@@ -189,3 +189,24 @@ const tmpDir = os.tmpdir();
 export function del(path: string, tmp = tmpDir): TPromise<void> {
 	return nfcall(extfs.del, path, tmp);
 }
+
+export function whenDeleted(path: string): TPromise<void> {
+
+	// Complete when wait marker file is deleted
+	return new TPromise<void>(c => {
+		let running = false;
+		const interval = setInterval(() => {
+			if (!running) {
+				running = true;
+				fs.exists(path, exists => {
+					running = false;
+
+					if (!exists) {
+						clearInterval(interval);
+						c(null);
+					}
+				});
+			}
+		}, 1000);
+	});
+}