Memory leak #30
Description
I am encountering a persistent memory allocation issue with this otherwise awesome library.
Specifically, when a UIPopoverPresentationController (showing a modal VC with extended data on a given node, in response to user interaction) is presented and dismissed repeatedly, the app crashes with a [Render] CoreAnimation: failed to allocate IOSurface error.
This appears to be an issue related to the handling of nodes on calling the session.pause() method from the AR VC's viewDidDisappear code. I suspect this problem is related to the the issue discussed here:
https://stackoverflow.com/questions/28738551/how-can-i-remove-all-nodes-from-a-scenekit-scene
It looks like the annotationManager class here is not fully deallocating resources when the session is paused (nor on on calling removeAllAnnotations). Unfortunately I haven't been able to resolve this based on the SO answer.