Slack Integration for Sonos

Nice and simple - it'll post the currently playing song to Slack.

1. Install node.js
2. Create a new incoming Slack webhook at https://yoursite.slack.com/services/new/incoming-webhook and record the Webhook URL.
3. In the Sonos application's About screen, record the Sonos box's IP address.
4. Copy config-example.json to config.json and edit in your webhook URL and Sonos IP address.
5. Run npm install to install dependencies.
6. Run ./index.iced.