JSON output to console

[tlansec]

I considered doing this as a PR but I'm not sure whether:

1. It would be accepted
2. How best to do this while retaining the colouring // style of other output types

Essentially for both the search and host command I think it would be useful to be able to just immediately print the JSON to the console so that it could be read // manipulated via jq, e.g.

shodan host 1.2.3.4 --format json | jq <some jq syntax>

Would something like this be acceptable?

def host_print_json(host, history=False):
    click.echo(json.dumps(host['data'], sort_keys=True, indent=4))