add events.json to gitignore
add jsonfile to package.json
delete events.json from git
small cleanups
default output to stdout.

Allow -o or reading from config. It's nice to send output to
standard output since it makes this app/lib more modular-
We can than pipe it's output into another progaram.

For example: MEETUP_API_KEY=<key> node index.js | jq '.'
add -v for verbosity.

It's better to be quite when there is
nothing insightful to say.
http://www.linfo.org/rule_of_silence.html