Websocket conn logs: now debug, not info
Fixes #392, update tests so that Unix time is calculated in seconds
Option to supply a custom message formatter for Slack integration
Merge pull request #394 from jwinter/fix-milliseconds-unix-test

Fixes #392, update tests so that Unix time is calculated in seconds
Merge pull request #393 from dm3/customizable-slack

Option to supply a custom message formatter for Slack integration
Merge branch 'master' of github.com:aphyr/riemann