Allow <exit /> nodes
Allow <exit /> nodes

Was having a problem where an `<exit />` node was causing issues. The following line was causing the issue:

```xml
<exit id="OIG-iv-Mez" userLabel="Exit" sceneMemberID="exit"/>
```
krzyzanowskim/Natalie,phimage/Natalie,kostiakoval/Natalie,phimage/Natalie,krzyzanowskim/Natalie,alvinvarghese/Natalie