To use this bot, first [create a bot] (https://my.slack.com/services/new/bot), and then:
npm install botkit
npm install dateformat
git clone https://github.com/colinthesealion/burning-man-countdown-slackbot.git
cp burning-man-countdown-slackbot/simple_storage.js ~/node_modules/botkit/lib/storage/
SLACKBOT_TOKEN='you should know this' node burning-man-countdown-slackbot/countdown_bot.js