IAppWindow interface 
Represents a window or frame within the host app.
Methods
| add | Add a listener that will be called when an event is received from this AppWindow. | 
| post | Send a message to the AppWindow. | 
Method Details
		addEventListener(string, Function)
	  
	Add a listener that will be called when an event is received from this AppWindow.
function addEventListener(type: string, listener: Function)Parameters
- type
- 
				string 
The event to listen to. Currently the only supported type is 'message'.
- listener
- 
				Function 
The listener that will be called
		postMessage(any, onCompleteFunctionType)
	    
	Send a message to the AppWindow.
function postMessage(message: any, onComplete?: onCompleteFunctionType)Parameters
- message
- 
				any 
The message to send
- onComplete
- onCompleteFunctionType
The callback to know if the postMessage has been success/failed.