Provide strict model parsing

[stan-sz]

Currently the deserializer silently ignores any extraneous properties (see #574). This request is to make it configurable, as there are scenarios where throwing the exception is expected, specifically when providing a type map with locally-mainteined models.

[IvanJosipovic]

I would also love to see all the serialization settings exposed to us and customizable.

[tg123]

@IvanJosipovic PRs of your idea are welcomed