Provide pure lazy functionality for handling/querying extremely large files

[quinnj]

Currently, the generic read function requires allocating an internal tape large enough to hold the entire json object being parsed; for extremely large objects, this is problematic because we can't allocate an internal tape large enough. We could, however, provide LazyJSON-like functionality by allowing a lazy access to the parsed JSON object/array.

[JeffreySarnoff]

I just saw this from Daniel Lemire, thought to forward the link
Parsing gigabytes of JSON per second