Azaaroth

Add support for multiple contexts

1

As we can see in [presentation specification](https://iiif.io/api/presentation/2.1/#linked-data-context-and-extensions), we can give multiple contexts (to link default and custom contexts). e.g ``` { "@context": [ "http://iiif.io/api/presentation/2/context.json", "http://example.org/extension/context.json" ] } ``` It seems...

I'm still getting the following error while my manifest seems ok: > Validation Error: sc:Canvas['label'] not present and required It only returns one sequence with a single canvas which actually...