Simple scraper to post new Resistance Calendar events to slack.

There's no database, it just uses the filesystem to remember which events it's seen before.

Setup:

1. Run npm install to install dependencies
2. Set FB_TOKEN and SLACK_ENDPOINT environment variables
3. Run node index.js init to generate an initial list of event IDs
4. Run node index.js to check for new events and post to Slack if we find any (you probably want to add this command to a crontab or something)