CLI should reflect the full Javascript API

The command line interface to the API is a convenient way to access common functions (individual card retrieval, set retrieval). For non-Javascript developers, it also provides a way to cleanly access the API. It would be great if the full API (formats, types, sets) was supported. I personally would make use of at least the `sets` function if it were available to me. Also, if I add searching by type to my project (I may do), then the `types` function would be very useful.