More refactoring stuff

- Add a waitForEventQueue promise, to get rid of the 5 second fudge from testBot.js
- Async'ify testBot.js
- Complete plumbing for Hint's ScriptDialog support (see changes to ScriptDialogEvent.ts and Comms.ts
- Fix: The EventQueue was pausing for 5 seconds every 30 seconds

dist/classes/EventQueueClient.d.ts

@@ -13,5 +13,5 @@ export declare class EventQueueClient {
     shutdown(): void;
     Get(): void;
     request(url: string, data: string, contentType: string): Promise<string>;
-    capsRequestXML(capability: string, data: any): Promise<any>;
+    capsRequestXML(capability: string, data: any, attempt?: number): Promise<any>;
 }