nlf/bucker — pull request #29 by cjthompson (2014-05-31 00:05:47+00:00)
Title: Teach logStash to optionally log to a local file

This change leverages the logstash writer to write to a log file using the logstash format.

This change allows for a `file` key to define an output log file that will be written to independently of the redis or udp settings.

* Example usage:

```json
{
"logstash": {
"file": "/var/log/app/logstash.log"
}
}
```