Slack soundbot

1. create a bot for your organisation using the Slack web interface
2. create a channel for your bot to listen to and invite your bot there
3. copy config.py.example to config.py
4. fill in your bot's API key and channel name in config.py
5. install a command line mp3 file player, e.g. mplayer. On MacOS you can use afplay
6. pip install slacksocket
7. python soundbot.py
8. put some mp3 files in this directory
9. enter a filename (leave off .mp3) in your Slack channel
10. or say "list" to list the available mp3s
11. enjoy!