Use the icon resource specified in Resources.rc in MSW

This change allows the icon specified in Resources.rc for MSW apps to actually be used in the top left of the window, in the taskbar, etc. This is the relevant line in Resources.rc:

```
1	ICON	"..\\resources\\cinder_app_icon.ico"
```

I know very little about Win32 programming... I figured out how to do this as I needed it quickly, so there is probably a more robust solution. This would not support changing the integer id of ICON to anything besides 1, though I don't know if that's a problem.