preload.json crashes Jason app (Not sure if this is expected to work or not)

the project [preload.json](https://github.com/Jasonette/JASONETTE-iOS/blob/develop/app/Jasonette/preload.json) - is that expected to work? It's not (unless you inject additional elements) fully formed, the "layers" element isn't wrapped in a $jason/body or a $jason/head/templates/body container. If you run that exact json on the Jason app it crashes. Maybe I'm missing something and you automatically wrap the contents of preload.json with the $jason or something?

Start with app/Jasonette/preload.json and reproduce the crash by running the exact JSON in the Jason app. Trace how preload.json is loaded and whether it is expected to be wrapped in a $jason/head/templates/body container. Done means the expected format and crash behavior are clarified, with the issue's reported case handled accordingly.

Written by the indexing model from the issue text.